import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		@SuppressWarnings("resource")
		Scanner scan = new Scanner(System.in);

		int K = scan.nextInt();
		int S = scan.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 {

	public static void main(String[] args) {
		@SuppressWarnings("resource")
		Scanner scan = new Scanner(System.in);

		int K = scan.nextInt();
		int S = scan.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 public static void main(String[] args) {
		@SuppressWarnings("resource")
		Scanner scan = new Scanner(System.in);

		int K = scan.nextInt();
		int S = scan.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 {
		@SuppressWarnings("resource")
		Scanner scan = new Scanner(System.in);

		int K = scan.nextInt();
		int S = scan.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);
	} @SuppressWarnings("resource")
		Scanner scan = new Scanner(System.in); scan new Scanner(System.in) int K = scan.nextInt(); K scan.nextInt() scan.nextInt scan int S = scan.nextInt(); S scan.nextInt() scan.nextInt scan 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 {

	public static void main(String[] args) {
		@SuppressWarnings("resource")
		Scanner scan = new Scanner(System.in);

		int K = scan.nextInt();
		int S = scan.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 {

	public static void main(String[] args) {
		@SuppressWarnings("resource")
		Scanner scan = new Scanner(System.in);

		int K = scan.nextInt();
		int S = scan.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 {

	public static void main(String[] args) {
		@SuppressWarnings("resource")
		Scanner scan = new Scanner(System.in);

		int K = scan.nextInt();
		int S = scan.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);
	}

}