import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		// 入力1をnに入れる
		int k = sc.nextInt();
		int s = sc.nextInt();
		int count = 0;
		int l;

		for (int i = 0; i <= k; i++) {
			for (int j = 0; j <= k; j++) {
				l = s - i - j;
				if ( !(l < 0 || k < l) && i + j + l == s) {
					count++;
				}
			}
		}

		System.out.println(count);
	}
} import java.util.Scanner; Scanner java.util public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		// 入力1をnに入れる
		int k = sc.nextInt();
		int s = sc.nextInt();
		int count = 0;
		int l;

		for (int i = 0; i <= k; i++) {
			for (int j = 0; j <= k; j++) {
				l = s - i - j;
				if ( !(l < 0 || k < l) && i + j + l == s) {
					count++;
				}
			}
		}

		System.out.println(count);
	}
} Main public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		// 入力1をnに入れる
		int k = sc.nextInt();
		int s = sc.nextInt();
		int count = 0;
		int l;

		for (int i = 0; i <= k; i++) {
			for (int j = 0; j <= k; j++) {
				l = s - i - j;
				if ( !(l < 0 || k < l) && i + j + l == s) {
					count++;
				}
			}
		}

		System.out.println(count);
	} main {
		Scanner sc = new Scanner(System.in);
		// 入力1をnに入れる
		int k = sc.nextInt();
		int s = sc.nextInt();
		int count = 0;
		int l;

		for (int i = 0; i <= k; i++) {
			for (int j = 0; j <= k; j++) {
				l = s - i - j;
				if ( !(l < 0 || k < l) && i + j + l == s) {
					count++;
				}
			}
		}

		System.out.println(count);
	} Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int k = sc.nextInt(); k sc.nextInt() sc.nextInt sc int s = sc.nextInt(); s sc.nextInt() sc.nextInt sc int count = 0; count 0 int l; l for (int i = 0; i <= k; i++) {
			for (int j = 0; j <= k; j++) {
				l = s - i - j;
				if ( !(l < 0 || k < l) && i + j + l == s) {
					count++;
				}
			}
		} int i = 0; int i = 0; i 0 i <= k i k i++ i++ i {
			for (int j = 0; j <= k; j++) {
				l = s - i - j;
				if ( !(l < 0 || k < l) && i + j + l == s) {
					count++;
				}
			}
		} {
			for (int j = 0; j <= k; j++) {
				l = s - i - j;
				if ( !(l < 0 || k < l) && i + j + l == s) {
					count++;
				}
			}
		} for (int j = 0; j <= k; j++) {
				l = s - i - j;
				if ( !(l < 0 || k < l) && i + j + l == s) {
					count++;
				}
			} int j = 0; int j = 0; j 0 j <= k j k j++ j++ j {
				l = s - i - j;
				if ( !(l < 0 || k < l) && i + j + l == s) {
					count++;
				}
			} {
				l = s - i - j;
				if ( !(l < 0 || k < l) && i + j + l == s) {
					count++;
				}
			} l = s - i - j l s - i - j s - i - j s i j if ( !(l < 0 || k < l) && i + j + l == s) {
					count++;
				} !(l < 0 || k < l) && i + j + l == s !(l < 0 || k < l) (l < 0 || k < l) l < 0 l 0 k < l k l i + j + l == s i + j + l i + j + l i j l s {
					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 sc = new Scanner(System.in);
		// 入力1をnに入れる
		int k = sc.nextInt();
		int s = sc.nextInt();
		int count = 0;
		int l;

		for (int i = 0; i <= k; i++) {
			for (int j = 0; j <= k; j++) {
				l = s - i - j;
				if ( !(l < 0 || k < l) && i + j + l == s) {
					count++;
				}
			}
		}

		System.out.println(count);
	}
} public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		// 入力1をnに入れる
		int k = sc.nextInt();
		int s = sc.nextInt();
		int count = 0;
		int l;

		for (int i = 0; i <= k; i++) {
			for (int j = 0; j <= k; j++) {
				l = s - i - j;
				if ( !(l < 0 || k < l) && i + j + l == s) {
					count++;
				}
			}
		}

		System.out.println(count);
	}
} Main
import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		// 入力1をnに入れる
		int k = sc.nextInt();
		int s = sc.nextInt();
		int count = 0;
		int l;

		for (int i = 0; i <= k; i++) {
			for (int j = 0; j <= k; j++) {
				l = s - i - j;
				if ( !(l < 0 || k < l) && i + j + l == s) {
					count++;
				}
			}
		}

		System.out.println(count);
	}
}