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; x++){
          for(int y=0; y<=K; y++){
            int z = S-x-y;
            if(z>=0 && z<=K){
              count++;
            }
          }
        }
        System.out.println(count);
    }
} 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; x++){
          for(int y=0; y<=K; y++){
            int z = S-x-y;
            if(z>=0 && z<=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 x=0; x<=K; x++){
          for(int y=0; y<=K; y++){
            int z = S-x-y;
            if(z>=0 && z<=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 x=0; x<=K; x++){
          for(int y=0; y<=K; y++){
            int z = S-x-y;
            if(z>=0 && z<=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 x=0; x<=K; x++){
          for(int y=0; y<=K; y++){
            int z = S-x-y;
            if(z>=0 && z<=K){
              count++;
            }
          }
        } 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(z>=0 && z<=K){
              count++;
            }
          }
        } {
          for(int y=0; y<=K; y++){
            int z = S-x-y;
            if(z>=0 && z<=K){
              count++;
            }
          }
        } for(int y=0; y<=K; y++){
            int z = S-x-y;
            if(z>=0 && z<=K){
              count++;
            }
          } int y=0; int y=0; y 0 y<=K y K y++ y++ y {
            int z = S-x-y;
            if(z>=0 && z<=K){
              count++;
            }
          } {
            int z = S-x-y;
            if(z>=0 && z<=K){
              count++;
            }
          } int z = S-x-y; z S-x-y S-x-y S x y if(z>=0 && z<=K){
              count++;
            } z>=0 && z<=K z>=0 z 0 z<=K z K {
              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; x++){
          for(int y=0; y<=K; y++){
            int z = S-x-y;
            if(z>=0 && z<=K){
              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; x++){
          for(int y=0; y<=K; y++){
            int z = S-x-y;
            if(z>=0 && z<=K){
              count++;
            }
          }
        }
        System.out.println(count);
    }
} Main
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; x++){
          for(int y=0; y<=K; y++){
            int z = S-x-y;
            if(z>=0 && z<=K){
              count++;
            }
          }
        }
        System.out.println(count);
    }
}