import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		Scanner scanner = new Scanner(System.in);
		int k = scanner.nextInt();
		int s = scanner.nextInt();
		scanner.close();

		int count = 0;

		for (int x = 0; x <= k; x++) {
			for (int y = 0; y <= k; y++) {
				int z = 0;
				if(x + y < s && s - (x + y) <= k) {
					z = s - (x + y);
				}
				if (x + y + z == s) {
					// System.out.printf("%d, %d, %d\n", x, y, z);
					count++;
				}
			}
		}

		System.out.println(count);

	}

} import java.util.Scanner; Scanner java.util public class Main {

	public static void main(String[] args) {
		Scanner scanner = new Scanner(System.in);
		int k = scanner.nextInt();
		int s = scanner.nextInt();
		scanner.close();

		int count = 0;

		for (int x = 0; x <= k; x++) {
			for (int y = 0; y <= k; y++) {
				int z = 0;
				if(x + y < s && s - (x + y) <= k) {
					z = s - (x + y);
				}
				if (x + y + z == s) {
					// System.out.printf("%d, %d, %d\n", x, y, z);
					count++;
				}
			}
		}

		System.out.println(count);

	}

} Main public static void main(String[] args) {
		Scanner scanner = new Scanner(System.in);
		int k = scanner.nextInt();
		int s = scanner.nextInt();
		scanner.close();

		int count = 0;

		for (int x = 0; x <= k; x++) {
			for (int y = 0; y <= k; y++) {
				int z = 0;
				if(x + y < s && s - (x + y) <= k) {
					z = s - (x + y);
				}
				if (x + y + z == s) {
					// System.out.printf("%d, %d, %d\n", x, y, z);
					count++;
				}
			}
		}

		System.out.println(count);

	} main {
		Scanner scanner = new Scanner(System.in);
		int k = scanner.nextInt();
		int s = scanner.nextInt();
		scanner.close();

		int count = 0;

		for (int x = 0; x <= k; x++) {
			for (int y = 0; y <= k; y++) {
				int z = 0;
				if(x + y < s && s - (x + y) <= k) {
					z = s - (x + y);
				}
				if (x + y + z == s) {
					// System.out.printf("%d, %d, %d\n", x, y, z);
					count++;
				}
			}
		}

		System.out.println(count);

	} Scanner scanner = new Scanner(System.in); scanner new Scanner(System.in) int k = scanner.nextInt(); k scanner.nextInt() scanner.nextInt scanner int s = scanner.nextInt(); s scanner.nextInt() scanner.nextInt scanner scanner.close() scanner.close scanner int count = 0; count 0 for (int x = 0; x <= k; x++) {
			for (int y = 0; y <= k; y++) {
				int z = 0;
				if(x + y < s && s - (x + y) <= k) {
					z = s - (x + y);
				}
				if (x + y + z == s) {
					// System.out.printf("%d, %d, %d\n", x, y, z);
					count++;
				}
			}
		} int x = 0; int x = 0; x 0 x <= k x k x++ x++ x {
			for (int y = 0; y <= k; y++) {
				int z = 0;
				if(x + y < s && s - (x + y) <= k) {
					z = s - (x + y);
				}
				if (x + y + z == s) {
					// System.out.printf("%d, %d, %d\n", x, y, z);
					count++;
				}
			}
		} {
			for (int y = 0; y <= k; y++) {
				int z = 0;
				if(x + y < s && s - (x + y) <= k) {
					z = s - (x + y);
				}
				if (x + y + z == s) {
					// System.out.printf("%d, %d, %d\n", x, y, z);
					count++;
				}
			}
		} for (int y = 0; y <= k; y++) {
				int z = 0;
				if(x + y < s && s - (x + y) <= k) {
					z = s - (x + y);
				}
				if (x + y + z == s) {
					// System.out.printf("%d, %d, %d\n", x, y, z);
					count++;
				}
			} int y = 0; int y = 0; y 0 y <= k y k y++ y++ y {
				int z = 0;
				if(x + y < s && s - (x + y) <= k) {
					z = s - (x + y);
				}
				if (x + y + z == s) {
					// System.out.printf("%d, %d, %d\n", x, y, z);
					count++;
				}
			} {
				int z = 0;
				if(x + y < s && s - (x + y) <= k) {
					z = s - (x + y);
				}
				if (x + y + z == s) {
					// System.out.printf("%d, %d, %d\n", x, y, z);
					count++;
				}
			} int z = 0; z 0 if(x + y < s && s - (x + y) <= k) {
					z = s - (x + y);
				} x + y < s && s - (x + y) <= k x + y < s x + y x y s s - (x + y) <= k s - (x + y) s (x + y) x y k {
					z = s - (x + y);
				} z = s - (x + y) z s - (x + y) s (x + y) x y if (x + y + z == s) {
					// System.out.printf("%d, %d, %d\n", x, y, z);
					count++;
				} x + y + z == s x + y + z x + y + z x y z s {
					// System.out.printf("%d, %d, %d\n", x, y, z);
					count++;
				} count++ count System.out.println(count) System.out.println System.out System System.out count String[] args args public class Main {

	public static void main(String[] args) {
		Scanner scanner = new Scanner(System.in);
		int k = scanner.nextInt();
		int s = scanner.nextInt();
		scanner.close();

		int count = 0;

		for (int x = 0; x <= k; x++) {
			for (int y = 0; y <= k; y++) {
				int z = 0;
				if(x + y < s && s - (x + y) <= k) {
					z = s - (x + y);
				}
				if (x + y + z == s) {
					// System.out.printf("%d, %d, %d\n", x, y, z);
					count++;
				}
			}
		}

		System.out.println(count);

	}

} public class Main {

	public static void main(String[] args) {
		Scanner scanner = new Scanner(System.in);
		int k = scanner.nextInt();
		int s = scanner.nextInt();
		scanner.close();

		int count = 0;

		for (int x = 0; x <= k; x++) {
			for (int y = 0; y <= k; y++) {
				int z = 0;
				if(x + y < s && s - (x + y) <= k) {
					z = s - (x + y);
				}
				if (x + y + z == s) {
					// System.out.printf("%d, %d, %d\n", x, y, z);
					count++;
				}
			}
		}

		System.out.println(count);

	}

} Main
import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		Scanner scanner = new Scanner(System.in);
		int k = scanner.nextInt();
		int s = scanner.nextInt();
		scanner.close();

		int count = 0;

		for (int x = 0; x <= k; x++) {
			for (int y = 0; y <= k; y++) {
				int z = 0;
				if(x + y < s && s - (x + y) <= k) {
					z = s - (x + y);
				}
				if (x + y + z == s) {
					// System.out.printf("%d, %d, %d\n", x, y, z);
					count++;
				}
			}
		}

		System.out.println(count);

	}

}
