import 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 count = 0;

        for(int i = 0;i <= k;i++)
            for(int j = 0;j <= k;j++){
                if(i+j <= s && s-i-j <= k)
                    count++;
            }
        System.out.println(count);

    }
} import java.util.*; util.* java 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 i = 0;i <= k;i++)
            for(int j = 0;j <= k;j++){
                if(i+j <= s && s-i-j <= k)
                    count++;
            }
        System.out.println(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 i = 0;i <= k;i++)
            for(int j = 0;j <= k;j++){
                if(i+j <= s && s-i-j <= k)
                    count++;
            }
        System.out.println(count);

    } main {
        Scanner sc = new Scanner(System.in);
        int k = sc.nextInt();
        int s = sc.nextInt();
        int count = 0;

        for(int i = 0;i <= k;i++)
            for(int j = 0;j <= k;j++){
                if(i+j <= s && s-i-j <= k)
                    count++;
            }
        System.out.println(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 i = 0;i <= k;i++)
            for(int j = 0;j <= k;j++){
                if(i+j <= s && s-i-j <= k)
                    count++;
            } int i = 0; int i = 0; i 0 i <= k i k i++ i++ i for(int j = 0;j <= k;j++){
                if(i+j <= s && s-i-j <= k)
                    count++;
            } for(int j = 0;j <= k;j++){
                if(i+j <= s && s-i-j <= k)
                    count++;
            } int j = 0; int j = 0; j 0 j <= k j k j++ j++ j {
                if(i+j <= s && s-i-j <= k)
                    count++;
            } {
                if(i+j <= s && s-i-j <= k)
                    count++;
            } if(i+j <= s && s-i-j <= k)
                    count++; i+j <= s && s-i-j <= k i+j <= s i+j i j s s-i-j <= k s-i-j s-i-j s i j k count++ count System.out.println(count) System.out.println System.out System System.out count String[] args args
import 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 count = 0;

        for(int i = 0;i <= k;i++)
            for(int j = 0;j <= k;j++){
                if(i+j <= s && s-i-j <= k)
                    count++;
            }
        System.out.println(count);

    }
}