import java.util.*;


public class Main {
    public static void main(String[] args) throws Exception {
        Scanner sc = new Scanner(System.in);
        
        int k = sc.nextInt();
        int s = sc.nextInt();
        int ans=0;
        
        for(int i=0; i<=k; i++){
            for(int j=0; j<=k; j++){
                int z = s-i-j;
          		if(z >=0 && z<=k) {
          			ans++;
                }
            }
        }
		System.out.println(ans);
	}
} import java.util.*; util.* java public class Main {
    public static void main(String[] args) throws Exception {
        Scanner sc = new Scanner(System.in);
        
        int k = sc.nextInt();
        int s = sc.nextInt();
        int ans=0;
        
        for(int i=0; i<=k; i++){
            for(int j=0; j<=k; j++){
                int z = s-i-j;
          		if(z >=0 && z<=k) {
          			ans++;
                }
            }
        }
		System.out.println(ans);
	}
} Main public static void main(String[] args) throws Exception {
        Scanner sc = new Scanner(System.in);
        
        int k = sc.nextInt();
        int s = sc.nextInt();
        int ans=0;
        
        for(int i=0; i<=k; i++){
            for(int j=0; j<=k; j++){
                int z = s-i-j;
          		if(z >=0 && z<=k) {
          			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 i=0; i<=k; i++){
            for(int j=0; j<=k; j++){
                int z = s-i-j;
          		if(z >=0 && z<=k) {
          			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 i=0; i<=k; i++){
            for(int j=0; j<=k; j++){
                int z = s-i-j;
          		if(z >=0 && z<=k) {
          			ans++;
                }
            }
        } int i=0; int i=0; i 0 i<=k i k i++ i++ i {
            for(int j=0; j<=k; j++){
                int z = s-i-j;
          		if(z >=0 && z<=k) {
          			ans++;
                }
            }
        } {
            for(int j=0; j<=k; j++){
                int z = s-i-j;
          		if(z >=0 && z<=k) {
          			ans++;
                }
            }
        } for(int j=0; j<=k; j++){
                int z = s-i-j;
          		if(z >=0 && z<=k) {
          			ans++;
                }
            } int j=0; int j=0; j 0 j<=k j k j++ j++ j {
                int z = s-i-j;
          		if(z >=0 && z<=k) {
          			ans++;
                }
            } {
                int z = s-i-j;
          		if(z >=0 && z<=k) {
          			ans++;
                }
            } int z = s-i-j; z s-i-j s-i-j s i j if(z >=0 && z<=k) {
          			ans++;
                } z >=0 && z<=k z >=0 z 0 z<=k z k {
          			ans++;
                } 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) throws Exception {
        Scanner sc = new Scanner(System.in);
        
        int k = sc.nextInt();
        int s = sc.nextInt();
        int ans=0;
        
        for(int i=0; i<=k; i++){
            for(int j=0; j<=k; j++){
                int z = s-i-j;
          		if(z >=0 && z<=k) {
          			ans++;
                }
            }
        }
		System.out.println(ans);
	}
} public class Main {
    public static void main(String[] args) throws Exception {
        Scanner sc = new Scanner(System.in);
        
        int k = sc.nextInt();
        int s = sc.nextInt();
        int ans=0;
        
        for(int i=0; i<=k; i++){
            for(int j=0; j<=k; j++){
                int z = s-i-j;
          		if(z >=0 && z<=k) {
          			ans++;
                }
            }
        }
		System.out.println(ans);
	}
} Main
import java.util.*;


public class Main {
    public static void main(String[] args) throws Exception {
        Scanner sc = new Scanner(System.in);
        
        int k = sc.nextInt();
        int s = sc.nextInt();
        int ans=0;
        
        for(int i=0; i<=k; i++){
            for(int j=0; j<=k; j++){
                int z = s-i-j;
          		if(z >=0 && z<=k) {
          			ans++;
                }
            }
        }
		System.out.println(ans);
	}
}
