import java.util.*;

public class Main {
    public static void main(String[] args) throws Exception {
        Scanner sc = new Scanner(System.in);
        long[] map = new long[100002];
        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++){
                if(s-i-j >= 0 && s-i-j <= 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);
        long[] map = new long[100002];
        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++){
                if(s-i-j >= 0 && s-i-j <= k){
                    ans++;
                }
            }
        }
        System.out.println(ans);
    }
} Main public static void main(String[] args) throws Exception {
        Scanner sc = new Scanner(System.in);
        long[] map = new long[100002];
        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++){
                if(s-i-j >= 0 && s-i-j <= k){
                    ans++;
                }
            }
        }
        System.out.println(ans);
    } main {
        Scanner sc = new Scanner(System.in);
        long[] map = new long[100002];
        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++){
                if(s-i-j >= 0 && s-i-j <= k){
                    ans++;
                }
            }
        }
        System.out.println(ans);
    } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) long[] map = new long[100002]; map new long[100002] 100002 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++){
                if(s-i-j >= 0 && s-i-j <= k){
                    ans++;
                }
            }
        } int i = 0; int i = 0; i 0 i <= k i k i++ i++ i {
            for(int j = 0; j <= k; j++){
                if(s-i-j >= 0 && s-i-j <= k){
                    ans++;
                }
            }
        } {
            for(int j = 0; j <= k; j++){
                if(s-i-j >= 0 && s-i-j <= k){
                    ans++;
                }
            }
        } for(int j = 0; j <= k; j++){
                if(s-i-j >= 0 && s-i-j <= k){
                    ans++;
                }
            } int j = 0; int j = 0; j 0 j <= k j k j++ j++ j {
                if(s-i-j >= 0 && s-i-j <= k){
                    ans++;
                }
            } {
                if(s-i-j >= 0 && s-i-j <= k){
                    ans++;
                }
            } if(s-i-j >= 0 && s-i-j <= k){
                    ans++;
                } s-i-j >= 0 && s-i-j <= k s-i-j >= 0 s-i-j s-i-j s i j 0 s-i-j <= k s-i-j s-i-j s i j 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);
        long[] map = new long[100002];
        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++){
                if(s-i-j >= 0 && s-i-j <= k){
                    ans++;
                }
            }
        }
        System.out.println(ans);
    }
} public class Main {
    public static void main(String[] args) throws Exception {
        Scanner sc = new Scanner(System.in);
        long[] map = new long[100002];
        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++){
                if(s-i-j >= 0 && s-i-j <= 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);
        long[] map = new long[100002];
        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++){
                if(s-i-j >= 0 && s-i-j <= k){
                    ans++;
                }
            }
        }
        System.out.println(ans);
    }
}
