import java.util.Scanner;

public class Main {
	/**
	 * Sum of Three Integers
	 * @param 2 ≦ K ≦ 2500
	 * @param 0 ≦ S ≦ 3K
	 * @param 0 ≦ X,Y,Z ≦ K
	 * @result X + Y + Z = S
	 */
	public static void main(String... args) {
		try (Scanner sc = new Scanner(System.in)) {
			int k = sc.nextInt();
			int s = sc.nextInt();
			int count = 0;
			for (int i = 0; i <= k; i++) {
				for (int j = 0; j <= k; j++) {
					if (0 <= s - i - j && s - i - j <= k) {
						count ++;
					}
				}
			}
			System.out.println(count);
		}
	}
} import java.util.Scanner; Scanner java.util public class Main {
	/**
	 * Sum of Three Integers
	 * @param 2 ≦ K ≦ 2500
	 * @param 0 ≦ S ≦ 3K
	 * @param 0 ≦ X,Y,Z ≦ K
	 * @result X + Y + Z = S
	 */
	public static void main(String... args) {
		try (Scanner sc = new Scanner(System.in)) {
			int k = sc.nextInt();
			int s = sc.nextInt();
			int count = 0;
			for (int i = 0; i <= k; i++) {
				for (int j = 0; j <= k; j++) {
					if (0 <= s - i - j && s - i - j <= k) {
						count ++;
					}
				}
			}
			System.out.println(count);
		}
	}
} Main /**
	 * Sum of Three Integers
	 * @param 2 ≦ K ≦ 2500
	 * @param 0 ≦ S ≦ 3K
	 * @param 0 ≦ X,Y,Z ≦ K
	 * @result X + Y + Z = S
	 */
	public static void main(String... args) {
		try (Scanner sc = new Scanner(System.in)) {
			int k = sc.nextInt();
			int s = sc.nextInt();
			int count = 0;
			for (int i = 0; i <= k; i++) {
				for (int j = 0; j <= k; j++) {
					if (0 <= s - i - j && s - i - j <= k) {
						count ++;
					}
				}
			}
			System.out.println(count);
		}
	} main {
		try (Scanner sc = new Scanner(System.in)) {
			int k = sc.nextInt();
			int s = sc.nextInt();
			int count = 0;
			for (int i = 0; i <= k; i++) {
				for (int j = 0; j <= k; j++) {
					if (0 <= s - i - j && s - i - j <= k) {
						count ++;
					}
				}
			}
			System.out.println(count);
		}
	} try (Scanner sc = new Scanner(System.in)) {
			int k = sc.nextInt();
			int s = sc.nextInt();
			int count = 0;
			for (int i = 0; i <= k; i++) {
				for (int j = 0; j <= k; j++) {
					if (0 <= s - i - j && s - i - j <= k) {
						count ++;
					}
				}
			}
			System.out.println(count);
		} {
			int k = sc.nextInt();
			int s = sc.nextInt();
			int count = 0;
			for (int i = 0; i <= k; i++) {
				for (int j = 0; j <= k; j++) {
					if (0 <= s - i - j && s - i - j <= k) {
						count ++;
					}
				}
			}
			System.out.println(count);
		} Scanner sc = new Scanner(System.in) Scanner sc = new Scanner(System.in) 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 for (int i = 0; i <= k; i++) {
				for (int j = 0; j <= k; j++) {
					if (0 <= s - i - j && s - i - j <= k) {
						count ++;
					}
				}
			} int i = 0; int i = 0; i 0 i <= k i k i++ i++ i {
				for (int j = 0; j <= k; j++) {
					if (0 <= s - i - j && s - i - j <= k) {
						count ++;
					}
				}
			} {
				for (int j = 0; j <= k; j++) {
					if (0 <= s - i - j && s - i - j <= k) {
						count ++;
					}
				}
			} for (int j = 0; j <= k; j++) {
					if (0 <= s - i - j && s - i - j <= k) {
						count ++;
					}
				} int j = 0; int j = 0; j 0 j <= k j k j++ j++ j {
					if (0 <= s - i - j && s - i - j <= k) {
						count ++;
					}
				} {
					if (0 <= s - i - j && s - i - j <= k) {
						count ++;
					}
				} if (0 <= s - i - j && s - i - j <= k) {
						count ++;
					} 0 <= s - i - j && s - i - j <= k 0 <= s - i - j 0 s - i - j s - i - j s i j s - i - j <= k s - i - j s - i - j s i j k {
						count ++;
					} count ++ count System.out.println(count) System.out.println System.out System System.out count String... args args public class Main {
	/**
	 * Sum of Three Integers
	 * @param 2 ≦ K ≦ 2500
	 * @param 0 ≦ S ≦ 3K
	 * @param 0 ≦ X,Y,Z ≦ K
	 * @result X + Y + Z = S
	 */
	public static void main(String... args) {
		try (Scanner sc = new Scanner(System.in)) {
			int k = sc.nextInt();
			int s = sc.nextInt();
			int count = 0;
			for (int i = 0; i <= k; i++) {
				for (int j = 0; j <= k; j++) {
					if (0 <= s - i - j && s - i - j <= k) {
						count ++;
					}
				}
			}
			System.out.println(count);
		}
	}
} public class Main {
	/**
	 * Sum of Three Integers
	 * @param 2 ≦ K ≦ 2500
	 * @param 0 ≦ S ≦ 3K
	 * @param 0 ≦ X,Y,Z ≦ K
	 * @result X + Y + Z = S
	 */
	public static void main(String... args) {
		try (Scanner sc = new Scanner(System.in)) {
			int k = sc.nextInt();
			int s = sc.nextInt();
			int count = 0;
			for (int i = 0; i <= k; i++) {
				for (int j = 0; j <= k; j++) {
					if (0 <= s - i - j && s - i - j <= k) {
						count ++;
					}
				}
			}
			System.out.println(count);
		}
	}
} Main
import java.util.Scanner;

public class Main {
	/**
	 * Sum of Three Integers
	 * @param 2 ≦ K ≦ 2500
	 * @param 0 ≦ S ≦ 3K
	 * @param 0 ≦ X,Y,Z ≦ K
	 * @result X + Y + Z = S
	 */
	public static void main(String... args) {
		try (Scanner sc = new Scanner(System.in)) {
			int k = sc.nextInt();
			int s = sc.nextInt();
			int count = 0;
			for (int i = 0; i <= k; i++) {
				for (int j = 0; j <= k; j++) {
					if (0 <= s - i - j && s - i - j <= k) {
						count ++;
					}
				}
			}
			System.out.println(count);
		}
	}
}