import java.util.Scanner;
import 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+1; x++){
            for(int y=0; y<k+1; y++){
                if(s-x-y<k+1 && s-x-y>=0){
                    count++;
                }

            }
        }


        System.out.println(count);


    }
} import java.util.Scanner; Scanner java.util import java.util.*; util.* java 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+1; x++){
            for(int y=0; y<k+1; y++){
                if(s-x-y<k+1 && s-x-y>=0){
                    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 x=0; x<k+1; x++){
            for(int y=0; y<k+1; y++){
                if(s-x-y<k+1 && s-x-y>=0){
                    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 x=0; x<k+1; x++){
            for(int y=0; y<k+1; y++){
                if(s-x-y<k+1 && s-x-y>=0){
                    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 x=0; x<k+1; x++){
            for(int y=0; y<k+1; y++){
                if(s-x-y<k+1 && s-x-y>=0){
                    count++;
                }

            }
        } int x=0; int x=0; x 0 x<k+1 x k+1 k 1 x++ x++ x {
            for(int y=0; y<k+1; y++){
                if(s-x-y<k+1 && s-x-y>=0){
                    count++;
                }

            }
        } {
            for(int y=0; y<k+1; y++){
                if(s-x-y<k+1 && s-x-y>=0){
                    count++;
                }

            }
        } for(int y=0; y<k+1; y++){
                if(s-x-y<k+1 && s-x-y>=0){
                    count++;
                }

            } int y=0; int y=0; y 0 y<k+1 y k+1 k 1 y++ y++ y {
                if(s-x-y<k+1 && s-x-y>=0){
                    count++;
                }

            } {
                if(s-x-y<k+1 && s-x-y>=0){
                    count++;
                }

            } if(s-x-y<k+1 && s-x-y>=0){
                    count++;
                } s-x-y<k+1 && s-x-y>=0 s-x-y<k+1 s-x-y s-x-y s x y k+1 k 1 s-x-y>=0 s-x-y s-x-y s x y 0 {
                    count++;
                } count++ count System.out.println(count) System.out.println 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+1; x++){
            for(int y=0; y<k+1; y++){
                if(s-x-y<k+1 && s-x-y>=0){
                    count++;
                }

            }
        }


        System.out.println(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+1; x++){
            for(int y=0; y<k+1; y++){
                if(s-x-y<k+1 && s-x-y>=0){
                    count++;
                }

            }
        }


        System.out.println(count);


    }
} Main
import java.util.Scanner;
import 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+1; x++){
            for(int y=0; y<k+1; y++){
                if(s-x-y<k+1 && s-x-y>=0){
                    count++;
                }

            }
        }


        System.out.println(count);


    }
}
