import java.util.*;
 
class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int K = Integer.parseInt(sc.next());
        int S = Integer.parseInt(sc.next());
        int C = 0;

        int nam = 0;

      
      for(int a=0;a<=K;a++){
       for(int b=0;b<=K;b++){
         C = S-a-b;
         if(0<=C&&C<=K){
           nam = nam +1;
         }
       }
      }
      System.out.print(nam);
    }
}
/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