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