
import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		//		new Main().solveA();
		new Main().solveB();
		// new Main().solveC();
		// new Main().solveD();
	}

	private void solveA() {
		Scanner scanner = null;
		String wk = "";

		try {
			scanner = new Scanner(System.in);
			wk = scanner.next();

			System.out.println(wk.replaceAll(",", " "));

		} finally {
			if (scanner != null) {
				scanner.close();
			}
		}
	}

	private void solveB() {
		Scanner scanner = null;
		int numK = 0;
		int s = 0;

		try {
			scanner = new Scanner(System.in);
			numK = scanner.nextInt();
			s = scanner.nextInt();

			int startK = 0;
			if (numK <= s / 3) {
				startK = numK;
			}
			int res = 0;
			for (int i = 0; i <= numK; i++) {
				for (int j = 0; j <= numK; j++) {
					if (s - i - j < 0) {
						break;
					} else if (s - i - j <= numK) {
						res++;
					}
					//					startK = s - i - j;
					//					for (int k = startK; k <= numK; k++) {
					//						if (i + j + k == s) {
					//							res++;
					//							break;
					//						}
					//					}
				}
			}

			System.out.println(res);

		} finally {
			if (scanner != null) {
				scanner.close();
			}
		}
	}

	private void solveC() {
		Scanner scanner = null;
		int lineAB = 0;
		int lineBC = 0;
		int lineCA = 0;

		try {
			scanner = new Scanner(System.in);
			lineAB = scanner.nextInt();

			System.out.println("");

		} finally {
			if (scanner != null) {
				scanner.close();
			}
		}
	}

	private void solveD() {
		Scanner scanner = null;
		int lineAB = 0;
		int lineBC = 0;
		int lineCA = 0;

		try {
			scanner = new Scanner(System.in);
			lineAB = scanner.nextInt();

			System.out.println("");

		} finally {
			if (scanner != null) {
				scanner.close();
			}
		}
	}
} import java.util.Scanner; Scanner java.util public class Main {

	public static void main(String[] args) {
		//		new Main().solveA();
		new Main().solveB();
		// new Main().solveC();
		// new Main().solveD();
	}

	private void solveA() {
		Scanner scanner = null;
		String wk = "";

		try {
			scanner = new Scanner(System.in);
			wk = scanner.next();

			System.out.println(wk.replaceAll(",", " "));

		} finally {
			if (scanner != null) {
				scanner.close();
			}
		}
	}

	private void solveB() {
		Scanner scanner = null;
		int numK = 0;
		int s = 0;

		try {
			scanner = new Scanner(System.in);
			numK = scanner.nextInt();
			s = scanner.nextInt();

			int startK = 0;
			if (numK <= s / 3) {
				startK = numK;
			}
			int res = 0;
			for (int i = 0; i <= numK; i++) {
				for (int j = 0; j <= numK; j++) {
					if (s - i - j < 0) {
						break;
					} else if (s - i - j <= numK) {
						res++;
					}
					//					startK = s - i - j;
					//					for (int k = startK; k <= numK; k++) {
					//						if (i + j + k == s) {
					//							res++;
					//							break;
					//						}
					//					}
				}
			}

			System.out.println(res);

		} finally {
			if (scanner != null) {
				scanner.close();
			}
		}
	}

	private void solveC() {
		Scanner scanner = null;
		int lineAB = 0;
		int lineBC = 0;
		int lineCA = 0;

		try {
			scanner = new Scanner(System.in);
			lineAB = scanner.nextInt();

			System.out.println("");

		} finally {
			if (scanner != null) {
				scanner.close();
			}
		}
	}

	private void solveD() {
		Scanner scanner = null;
		int lineAB = 0;
		int lineBC = 0;
		int lineCA = 0;

		try {
			scanner = new Scanner(System.in);
			lineAB = scanner.nextInt();

			System.out.println("");

		} finally {
			if (scanner != null) {
				scanner.close();
			}
		}
	}
} Main public static void main(String[] args) {
		//		new Main().solveA();
		new Main().solveB();
		// new Main().solveC();
		// new Main().solveD();
	} main {
		//		new Main().solveA();
		new Main().solveB();
		// new Main().solveC();
		// new Main().solveD();
	} new Main().solveB() new Main().solveB new Main() String[] args args private void solveA() {
		Scanner scanner = null;
		String wk = "";

		try {
			scanner = new Scanner(System.in);
			wk = scanner.next();

			System.out.println(wk.replaceAll(",", " "));

		} finally {
			if (scanner != null) {
				scanner.close();
			}
		}
	} solveA {
		Scanner scanner = null;
		String wk = "";

		try {
			scanner = new Scanner(System.in);
			wk = scanner.next();

			System.out.println(wk.replaceAll(",", " "));

		} finally {
			if (scanner != null) {
				scanner.close();
			}
		}
	} Scanner scanner = null; scanner null String wk = ""; wk "" try {
			scanner = new Scanner(System.in);
			wk = scanner.next();

			System.out.println(wk.replaceAll(",", " "));

		} finally {
			if (scanner != null) {
				scanner.close();
			}
		} {
			if (scanner != null) {
				scanner.close();
			}
		} if (scanner != null) {
				scanner.close();
			} scanner != null scanner null {
				scanner.close();
			} scanner.close() scanner.close scanner {
			scanner = new Scanner(System.in);
			wk = scanner.next();

			System.out.println(wk.replaceAll(",", " "));

		} scanner = new Scanner(System.in) scanner new Scanner(System.in) wk = scanner.next() wk scanner.next() scanner.next scanner System.out.println(wk.replaceAll(",", " ")) System.out.println System.out System System.out wk.replaceAll(",", " ") wk.replaceAll wk "," " " private void solveB() {
		Scanner scanner = null;
		int numK = 0;
		int s = 0;

		try {
			scanner = new Scanner(System.in);
			numK = scanner.nextInt();
			s = scanner.nextInt();

			int startK = 0;
			if (numK <= s / 3) {
				startK = numK;
			}
			int res = 0;
			for (int i = 0; i <= numK; i++) {
				for (int j = 0; j <= numK; j++) {
					if (s - i - j < 0) {
						break;
					} else if (s - i - j <= numK) {
						res++;
					}
					//					startK = s - i - j;
					//					for (int k = startK; k <= numK; k++) {
					//						if (i + j + k == s) {
					//							res++;
					//							break;
					//						}
					//					}
				}
			}

			System.out.println(res);

		} finally {
			if (scanner != null) {
				scanner.close();
			}
		}
	} solveB {
		Scanner scanner = null;
		int numK = 0;
		int s = 0;

		try {
			scanner = new Scanner(System.in);
			numK = scanner.nextInt();
			s = scanner.nextInt();

			int startK = 0;
			if (numK <= s / 3) {
				startK = numK;
			}
			int res = 0;
			for (int i = 0; i <= numK; i++) {
				for (int j = 0; j <= numK; j++) {
					if (s - i - j < 0) {
						break;
					} else if (s - i - j <= numK) {
						res++;
					}
					//					startK = s - i - j;
					//					for (int k = startK; k <= numK; k++) {
					//						if (i + j + k == s) {
					//							res++;
					//							break;
					//						}
					//					}
				}
			}

			System.out.println(res);

		} finally {
			if (scanner != null) {
				scanner.close();
			}
		}
	} Scanner scanner = null; scanner null int numK = 0; numK 0 int s = 0; s 0 try {
			scanner = new Scanner(System.in);
			numK = scanner.nextInt();
			s = scanner.nextInt();

			int startK = 0;
			if (numK <= s / 3) {
				startK = numK;
			}
			int res = 0;
			for (int i = 0; i <= numK; i++) {
				for (int j = 0; j <= numK; j++) {
					if (s - i - j < 0) {
						break;
					} else if (s - i - j <= numK) {
						res++;
					}
					//					startK = s - i - j;
					//					for (int k = startK; k <= numK; k++) {
					//						if (i + j + k == s) {
					//							res++;
					//							break;
					//						}
					//					}
				}
			}

			System.out.println(res);

		} finally {
			if (scanner != null) {
				scanner.close();
			}
		} {
			if (scanner != null) {
				scanner.close();
			}
		} if (scanner != null) {
				scanner.close();
			} scanner != null scanner null {
				scanner.close();
			} scanner.close() scanner.close scanner {
			scanner = new Scanner(System.in);
			numK = scanner.nextInt();
			s = scanner.nextInt();

			int startK = 0;
			if (numK <= s / 3) {
				startK = numK;
			}
			int res = 0;
			for (int i = 0; i <= numK; i++) {
				for (int j = 0; j <= numK; j++) {
					if (s - i - j < 0) {
						break;
					} else if (s - i - j <= numK) {
						res++;
					}
					//					startK = s - i - j;
					//					for (int k = startK; k <= numK; k++) {
					//						if (i + j + k == s) {
					//							res++;
					//							break;
					//						}
					//					}
				}
			}

			System.out.println(res);

		} scanner = new Scanner(System.in) scanner new Scanner(System.in) numK = scanner.nextInt() numK scanner.nextInt() scanner.nextInt scanner s = scanner.nextInt() s scanner.nextInt() scanner.nextInt scanner int startK = 0; startK 0 if (numK <= s / 3) {
				startK = numK;
			} numK <= s / 3 numK s / 3 s 3 {
				startK = numK;
			} startK = numK startK numK int res = 0; res 0 for (int i = 0; i <= numK; i++) {
				for (int j = 0; j <= numK; j++) {
					if (s - i - j < 0) {
						break;
					} else if (s - i - j <= numK) {
						res++;
					}
					//					startK = s - i - j;
					//					for (int k = startK; k <= numK; k++) {
					//						if (i + j + k == s) {
					//							res++;
					//							break;
					//						}
					//					}
				}
			} int i = 0; int i = 0; i 0 i <= numK i numK i++ i++ i {
				for (int j = 0; j <= numK; j++) {
					if (s - i - j < 0) {
						break;
					} else if (s - i - j <= numK) {
						res++;
					}
					//					startK = s - i - j;
					//					for (int k = startK; k <= numK; k++) {
					//						if (i + j + k == s) {
					//							res++;
					//							break;
					//						}
					//					}
				}
			} {
				for (int j = 0; j <= numK; j++) {
					if (s - i - j < 0) {
						break;
					} else if (s - i - j <= numK) {
						res++;
					}
					//					startK = s - i - j;
					//					for (int k = startK; k <= numK; k++) {
					//						if (i + j + k == s) {
					//							res++;
					//							break;
					//						}
					//					}
				}
			} for (int j = 0; j <= numK; j++) {
					if (s - i - j < 0) {
						break;
					} else if (s - i - j <= numK) {
						res++;
					}
					//					startK = s - i - j;
					//					for (int k = startK; k <= numK; k++) {
					//						if (i + j + k == s) {
					//							res++;
					//							break;
					//						}
					//					}
				} int j = 0; int j = 0; j 0 j <= numK j numK j++ j++ j {
					if (s - i - j < 0) {
						break;
					} else if (s - i - j <= numK) {
						res++;
					}
					//					startK = s - i - j;
					//					for (int k = startK; k <= numK; k++) {
					//						if (i + j + k == s) {
					//							res++;
					//							break;
					//						}
					//					}
				} {
					if (s - i - j < 0) {
						break;
					} else if (s - i - j <= numK) {
						res++;
					}
					//					startK = s - i - j;
					//					for (int k = startK; k <= numK; k++) {
					//						if (i + j + k == s) {
					//							res++;
					//							break;
					//						}
					//					}
				} if (s - i - j < 0) {
						break;
					} else if (s - i - j <= numK) {
						res++;
					} s - i - j < 0 s - i - j s - i - j s i j 0 {
						break;
					} break; if (s - i - j <= numK) {
						res++;
					} s - i - j <= numK s - i - j s - i - j s i j numK {
						res++;
					} res++ res System.out.println(res) System.out.println System.out System System.out res private void solveC() {
		Scanner scanner = null;
		int lineAB = 0;
		int lineBC = 0;
		int lineCA = 0;

		try {
			scanner = new Scanner(System.in);
			lineAB = scanner.nextInt();

			System.out.println("");

		} finally {
			if (scanner != null) {
				scanner.close();
			}
		}
	} solveC {
		Scanner scanner = null;
		int lineAB = 0;
		int lineBC = 0;
		int lineCA = 0;

		try {
			scanner = new Scanner(System.in);
			lineAB = scanner.nextInt();

			System.out.println("");

		} finally {
			if (scanner != null) {
				scanner.close();
			}
		}
	} Scanner scanner = null; scanner null int lineAB = 0; lineAB 0 int lineBC = 0; lineBC 0 int lineCA = 0; lineCA 0 try {
			scanner = new Scanner(System.in);
			lineAB = scanner.nextInt();

			System.out.println("");

		} finally {
			if (scanner != null) {
				scanner.close();
			}
		} {
			if (scanner != null) {
				scanner.close();
			}
		} if (scanner != null) {
				scanner.close();
			} scanner != null scanner null {
				scanner.close();
			} scanner.close() scanner.close scanner {
			scanner = new Scanner(System.in);
			lineAB = scanner.nextInt();

			System.out.println("");

		} scanner = new Scanner(System.in) scanner new Scanner(System.in) lineAB = scanner.nextInt() lineAB scanner.nextInt() scanner.nextInt scanner System.out.println("") System.out.println System.out System System.out "" private void solveD() {
		Scanner scanner = null;
		int lineAB = 0;
		int lineBC = 0;
		int lineCA = 0;

		try {
			scanner = new Scanner(System.in);
			lineAB = scanner.nextInt();

			System.out.println("");

		} finally {
			if (scanner != null) {
				scanner.close();
			}
		}
	} solveD {
		Scanner scanner = null;
		int lineAB = 0;
		int lineBC = 0;
		int lineCA = 0;

		try {
			scanner = new Scanner(System.in);
			lineAB = scanner.nextInt();

			System.out.println("");

		} finally {
			if (scanner != null) {
				scanner.close();
			}
		}
	} Scanner scanner = null; scanner null int lineAB = 0; lineAB 0 int lineBC = 0; lineBC 0 int lineCA = 0; lineCA 0 try {
			scanner = new Scanner(System.in);
			lineAB = scanner.nextInt();

			System.out.println("");

		} finally {
			if (scanner != null) {
				scanner.close();
			}
		} {
			if (scanner != null) {
				scanner.close();
			}
		} if (scanner != null) {
				scanner.close();
			} scanner != null scanner null {
				scanner.close();
			} scanner.close() scanner.close scanner {
			scanner = new Scanner(System.in);
			lineAB = scanner.nextInt();

			System.out.println("");

		} scanner = new Scanner(System.in) scanner new Scanner(System.in) lineAB = scanner.nextInt() lineAB scanner.nextInt() scanner.nextInt scanner System.out.println("") System.out.println System.out System System.out "" public class Main {

	public static void main(String[] args) {
		//		new Main().solveA();
		new Main().solveB();
		// new Main().solveC();
		// new Main().solveD();
	}

	private void solveA() {
		Scanner scanner = null;
		String wk = "";

		try {
			scanner = new Scanner(System.in);
			wk = scanner.next();

			System.out.println(wk.replaceAll(",", " "));

		} finally {
			if (scanner != null) {
				scanner.close();
			}
		}
	}

	private void solveB() {
		Scanner scanner = null;
		int numK = 0;
		int s = 0;

		try {
			scanner = new Scanner(System.in);
			numK = scanner.nextInt();
			s = scanner.nextInt();

			int startK = 0;
			if (numK <= s / 3) {
				startK = numK;
			}
			int res = 0;
			for (int i = 0; i <= numK; i++) {
				for (int j = 0; j <= numK; j++) {
					if (s - i - j < 0) {
						break;
					} else if (s - i - j <= numK) {
						res++;
					}
					//					startK = s - i - j;
					//					for (int k = startK; k <= numK; k++) {
					//						if (i + j + k == s) {
					//							res++;
					//							break;
					//						}
					//					}
				}
			}

			System.out.println(res);

		} finally {
			if (scanner != null) {
				scanner.close();
			}
		}
	}

	private void solveC() {
		Scanner scanner = null;
		int lineAB = 0;
		int lineBC = 0;
		int lineCA = 0;

		try {
			scanner = new Scanner(System.in);
			lineAB = scanner.nextInt();

			System.out.println("");

		} finally {
			if (scanner != null) {
				scanner.close();
			}
		}
	}

	private void solveD() {
		Scanner scanner = null;
		int lineAB = 0;
		int lineBC = 0;
		int lineCA = 0;

		try {
			scanner = new Scanner(System.in);
			lineAB = scanner.nextInt();

			System.out.println("");

		} finally {
			if (scanner != null) {
				scanner.close();
			}
		}
	}
} public class Main {

	public static void main(String[] args) {
		//		new Main().solveA();
		new Main().solveB();
		// new Main().solveC();
		// new Main().solveD();
	}

	private void solveA() {
		Scanner scanner = null;
		String wk = "";

		try {
			scanner = new Scanner(System.in);
			wk = scanner.next();

			System.out.println(wk.replaceAll(",", " "));

		} finally {
			if (scanner != null) {
				scanner.close();
			}
		}
	}

	private void solveB() {
		Scanner scanner = null;
		int numK = 0;
		int s = 0;

		try {
			scanner = new Scanner(System.in);
			numK = scanner.nextInt();
			s = scanner.nextInt();

			int startK = 0;
			if (numK <= s / 3) {
				startK = numK;
			}
			int res = 0;
			for (int i = 0; i <= numK; i++) {
				for (int j = 0; j <= numK; j++) {
					if (s - i - j < 0) {
						break;
					} else if (s - i - j <= numK) {
						res++;
					}
					//					startK = s - i - j;
					//					for (int k = startK; k <= numK; k++) {
					//						if (i + j + k == s) {
					//							res++;
					//							break;
					//						}
					//					}
				}
			}

			System.out.println(res);

		} finally {
			if (scanner != null) {
				scanner.close();
			}
		}
	}

	private void solveC() {
		Scanner scanner = null;
		int lineAB = 0;
		int lineBC = 0;
		int lineCA = 0;

		try {
			scanner = new Scanner(System.in);
			lineAB = scanner.nextInt();

			System.out.println("");

		} finally {
			if (scanner != null) {
				scanner.close();
			}
		}
	}

	private void solveD() {
		Scanner scanner = null;
		int lineAB = 0;
		int lineBC = 0;
		int lineCA = 0;

		try {
			scanner = new Scanner(System.in);
			lineAB = scanner.nextInt();

			System.out.println("");

		} finally {
			if (scanner != null) {
				scanner.close();
			}
		}
	}
} Main

import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		//		new Main().solveA();
		new Main().solveB();
		// new Main().solveC();
		// new Main().solveD();
	}

	private void solveA() {
		Scanner scanner = null;
		String wk = "";

		try {
			scanner = new Scanner(System.in);
			wk = scanner.next();

			System.out.println(wk.replaceAll(",", " "));

		} finally {
			if (scanner != null) {
				scanner.close();
			}
		}
	}

	private void solveB() {
		Scanner scanner = null;
		int numK = 0;
		int s = 0;

		try {
			scanner = new Scanner(System.in);
			numK = scanner.nextInt();
			s = scanner.nextInt();

			int startK = 0;
			if (numK <= s / 3) {
				startK = numK;
			}
			int res = 0;
			for (int i = 0; i <= numK; i++) {
				for (int j = 0; j <= numK; j++) {
					if (s - i - j < 0) {
						break;
					} else if (s - i - j <= numK) {
						res++;
					}
					//					startK = s - i - j;
					//					for (int k = startK; k <= numK; k++) {
					//						if (i + j + k == s) {
					//							res++;
					//							break;
					//						}
					//					}
				}
			}

			System.out.println(res);

		} finally {
			if (scanner != null) {
				scanner.close();
			}
		}
	}

	private void solveC() {
		Scanner scanner = null;
		int lineAB = 0;
		int lineBC = 0;
		int lineCA = 0;

		try {
			scanner = new Scanner(System.in);
			lineAB = scanner.nextInt();

			System.out.println("");

		} finally {
			if (scanner != null) {
				scanner.close();
			}
		}
	}

	private void solveD() {
		Scanner scanner = null;
		int lineAB = 0;
		int lineBC = 0;
		int lineCA = 0;

		try {
			scanner = new Scanner(System.in);
			lineAB = scanner.nextInt();

			System.out.println("");

		} finally {
			if (scanner != null) {
				scanner.close();
			}
		}
	}
}