import java.util.*;
class Main{
  public static void main(String[]args){
    Scanner scan = new Scanner(System.in);
    int K = scan.nextInt();
    int S = scan.nextInt();
    int c = 0;
    
    for(int i = 0; i < K+1;i++){
      for(int j = 0; j < K+1;j++){
        if(S-(i+j) <= K && 0 <= S-(i+j)){ c+= 1;}
      }
    }
    System.out.println(c);
  }
}
/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