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 sum = 0;
 
        for(int x = 0;x <= K;x++){
            if(x > S) break;
           for(int y = 0;y <= K;y++){
               if(x + y > S) break;
               int z = S -x - y;
               if(z >= 0 && z <= K) sum++;
               }
           } 
        
        System.out.println(sum);
    }
}
/tmp/hf-datasets-cache/medium/datasets/42704881117311-config-parquet-and-info-qiankunmu-Project_CodeNet-896c9d36/hub/datasets--qiankunmu--Project_CodeNet_Python800_and_Java250/snapshots/c899fde44a77ba1cc14973ed3de064e4ff3aadc7/Project_CodeNet_Java250.tar.gz