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 ans = 0, sum = 0;
    for(int i=0; i<=k; i++){
      for(int j=0; j<=k; j++){
        sum = s-i-j;
        if(0 <= sum && sum <= k){
          ans++;
        }
      }
    }
    System.out.println(ans);

    sc.close();
  }
}

/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