import java.util.Scanner;

class Main{
	public static void main(String args[]){
		Scanner sc = new Scanner(System.in);
		int k = sc.nextInt();
		int s = sc.nextInt();
		
		int answer = 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)){
					answer += 1;
				}
			}
		}
		
		System.out.println(answer);
	}
} import java.util.Scanner; Scanner java.util class Main{
	public static void main(String args[]){
		Scanner sc = new Scanner(System.in);
		int k = sc.nextInt();
		int s = sc.nextInt();
		
		int answer = 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)){
					answer += 1;
				}
			}
		}
		
		System.out.println(answer);
	}
} Main public static void main(String args[]){
		Scanner sc = new Scanner(System.in);
		int k = sc.nextInt();
		int s = sc.nextInt();
		
		int answer = 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)){
					answer += 1;
				}
			}
		}
		
		System.out.println(answer);
	} main {
		Scanner sc = new Scanner(System.in);
		int k = sc.nextInt();
		int s = sc.nextInt();
		
		int answer = 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)){
					answer += 1;
				}
			}
		}
		
		System.out.println(answer);
	} 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 answer = 0; answer 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)){
					answer += 1;
				}
			}
		} 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)){
					answer += 1;
				}
			}
		} {
			for(int y = 0; y <= k; y++){
				int z = s - x - y;
				if((0 <= z) && (z <= k)){
					answer += 1;
				}
			}
		} for(int y = 0; y <= k; y++){
				int z = s - x - y;
				if((0 <= z) && (z <= k)){
					answer += 1;
				}
			} 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)){
					answer += 1;
				}
			} {
				int z = s - x - y;
				if((0 <= z) && (z <= k)){
					answer += 1;
				}
			} int z = s - x - y; z s - x - y s - x - y s x y if((0 <= z) && (z <= k)){
					answer += 1;
				} (0 <= z) && (z <= k) (0 <= z) 0 z (z <= k) z k {
					answer += 1;
				} answer += 1 answer 1 System.out.println(answer) System.out.println System.out System System.out answer String args[] args
import java.util.Scanner;

class Main{
	public static void main(String args[]){
		Scanner sc = new Scanner(System.in);
		int k = sc.nextInt();
		int s = sc.nextInt();
		
		int answer = 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)){
					answer += 1;
				}
			}
		}
		
		System.out.println(answer);
	}
}