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