import java.util.Scanner;

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

		for(int x = 0;x <= K;x++) {
			for(int y = 0;y <= K;y++) {
				int z = S - x - y;
				if(z < 0) continue;
				if(z > K) continue;
				if(x+y+z == S)ans++;
			}
		}
		System.out.println(ans);
	}
} import java.util.Scanner; Scanner java.util public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int K = sc.nextInt();
		int S = sc.nextInt();
		int ans = 0;

		for(int x = 0;x <= K;x++) {
			for(int y = 0;y <= K;y++) {
				int z = S - x - y;
				if(z < 0) continue;
				if(z > K) continue;
				if(x+y+z == S)ans++;
			}
		}
		System.out.println(ans);
	}
} Main public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int K = sc.nextInt();
		int S = sc.nextInt();
		int ans = 0;

		for(int x = 0;x <= K;x++) {
			for(int y = 0;y <= K;y++) {
				int z = S - x - y;
				if(z < 0) continue;
				if(z > K) continue;
				if(x+y+z == S)ans++;
			}
		}
		System.out.println(ans);
	} main {
		Scanner sc = new Scanner(System.in);
		int K = sc.nextInt();
		int S = sc.nextInt();
		int ans = 0;

		for(int x = 0;x <= K;x++) {
			for(int y = 0;y <= K;y++) {
				int z = S - x - y;
				if(z < 0) continue;
				if(z > K) continue;
				if(x+y+z == S)ans++;
			}
		}
		System.out.println(ans);
	} 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 ans = 0; ans 0 for(int x = 0;x <= K;x++) {
			for(int y = 0;y <= K;y++) {
				int z = S - x - y;
				if(z < 0) continue;
				if(z > K) continue;
				if(x+y+z == S)ans++;
			}
		} int x = 0; int x = 0; x 0 x <= K x K x++ x++ x {
			for(int y = 0;y <= K;y++) {
				int z = S - x - y;
				if(z < 0) continue;
				if(z > K) continue;
				if(x+y+z == S)ans++;
			}
		} {
			for(int y = 0;y <= K;y++) {
				int z = S - x - y;
				if(z < 0) continue;
				if(z > K) continue;
				if(x+y+z == S)ans++;
			}
		} for(int y = 0;y <= K;y++) {
				int z = S - x - y;
				if(z < 0) continue;
				if(z > K) continue;
				if(x+y+z == S)ans++;
			} int y = 0; int y = 0; y 0 y <= K y K y++ y++ y {
				int z = S - x - y;
				if(z < 0) continue;
				if(z > K) continue;
				if(x+y+z == S)ans++;
			} {
				int z = S - x - y;
				if(z < 0) continue;
				if(z > K) continue;
				if(x+y+z == S)ans++;
			} int z = S - x - y; z S - x - y S - x - y S x y if(z < 0) continue; z < 0 z 0 continue; if(z > K) continue; z > K z K continue; if(x+y+z == S)ans++; x+y+z == S x+y+z x+y+z x y z S ans++ ans System.out.println(ans) System.out.println System.out System System.out ans String[] args args public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int K = sc.nextInt();
		int S = sc.nextInt();
		int ans = 0;

		for(int x = 0;x <= K;x++) {
			for(int y = 0;y <= K;y++) {
				int z = S - x - y;
				if(z < 0) continue;
				if(z > K) continue;
				if(x+y+z == S)ans++;
			}
		}
		System.out.println(ans);
	}
} public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int K = sc.nextInt();
		int S = sc.nextInt();
		int ans = 0;

		for(int x = 0;x <= K;x++) {
			for(int y = 0;y <= K;y++) {
				int z = S - x - y;
				if(z < 0) continue;
				if(z > K) continue;
				if(x+y+z == S)ans++;
			}
		}
		System.out.println(ans);
	}
} Main
import java.util.Scanner;

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

		for(int x = 0;x <= K;x++) {
			for(int y = 0;y <= K;y++) {
				int z = S - x - y;
				if(z < 0) continue;
				if(z > K) continue;
				if(x+y+z == S)ans++;
			}
		}
		System.out.println(ans);
	}
}