import java.util.*;

public class Main {
    public static void main(String[] args) throws Exception {
      Scanner sc = new Scanner(System.in);
      int k = sc.nextInt();
      int s = sc.nextInt();
      sc.close();
      int answer = 0;
      for (int x=0; x<=k; x++) {
        for (int y=0; y<=k; y++) {
          int z = s - x - y;
          if (z >= 0 && z <= k){
            answer++;
          }
        }
      }
      System.out.println(answer);
    }
}

/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