import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		long K = sc.nextLong();
		long S = sc.nextLong();
		long count = 0;

		for (int i = 0; i <= K; i++) {
			for (int j = 0; j <= K; j++) {
				if (S - i - j <= K && 0 <= S - i - j) {
					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);
		long K = sc.nextLong();
		long S = sc.nextLong();
		long count = 0;

		for (int i = 0; i <= K; i++) {
			for (int j = 0; j <= K; j++) {
				if (S - i - j <= K && 0 <= S - i - j) {
					count++;
				}
			}
		}
		System.out.println(count);
	}
} Main public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		long K = sc.nextLong();
		long S = sc.nextLong();
		long count = 0;

		for (int i = 0; i <= K; i++) {
			for (int j = 0; j <= K; j++) {
				if (S - i - j <= K && 0 <= S - i - j) {
					count++;
				}
			}
		}
		System.out.println(count);
	} main {
		Scanner sc = new Scanner(System.in);
		long K = sc.nextLong();
		long S = sc.nextLong();
		long count = 0;

		for (int i = 0; i <= K; i++) {
			for (int j = 0; j <= K; j++) {
				if (S - i - j <= K && 0 <= S - i - j) {
					count++;
				}
			}
		}
		System.out.println(count);
	} Scanner sc = new Scanner(System.in); sc new Scanner(System.in) long K = sc.nextLong(); K sc.nextLong() sc.nextLong sc long S = sc.nextLong(); S sc.nextLong() sc.nextLong sc long count = 0; count 0 for (int i = 0; i <= K; i++) {
			for (int j = 0; j <= K; j++) {
				if (S - i - j <= K && 0 <= S - i - j) {
					count++;
				}
			}
		} int i = 0; int i = 0; i 0 i <= K i K i++ i++ i {
			for (int j = 0; j <= K; j++) {
				if (S - i - j <= K && 0 <= S - i - j) {
					count++;
				}
			}
		} {
			for (int j = 0; j <= K; j++) {
				if (S - i - j <= K && 0 <= S - i - j) {
					count++;
				}
			}
		} for (int j = 0; j <= K; j++) {
				if (S - i - j <= K && 0 <= S - i - j) {
					count++;
				}
			} int j = 0; int j = 0; j 0 j <= K j K j++ j++ j {
				if (S - i - j <= K && 0 <= S - i - j) {
					count++;
				}
			} {
				if (S - i - j <= K && 0 <= S - i - j) {
					count++;
				}
			} if (S - i - j <= K && 0 <= S - i - j) {
					count++;
				} S - i - j <= K && 0 <= S - i - j S - i - j <= K S - i - j S - i - j S i j K 0 <= S - i - j 0 S - i - j S - i - j S i j {
					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);
		long K = sc.nextLong();
		long S = sc.nextLong();
		long count = 0;

		for (int i = 0; i <= K; i++) {
			for (int j = 0; j <= K; j++) {
				if (S - i - j <= K && 0 <= S - i - j) {
					count++;
				}
			}
		}
		System.out.println(count);
	}
} public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		long K = sc.nextLong();
		long S = sc.nextLong();
		long count = 0;

		for (int i = 0; i <= K; i++) {
			for (int j = 0; j <= K; j++) {
				if (S - i - j <= K && 0 <= S - i - j) {
					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);
		long K = sc.nextLong();
		long S = sc.nextLong();
		long count = 0;

		for (int i = 0; i <= K; i++) {
			for (int j = 0; j <= K; j++) {
				if (S - i - j <= K && 0 <= S - i - j) {
					count++;
				}
			}
		}
		System.out.println(count);
	}
}