import java.io.*;
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();
        int cnt = 0;
        for(int x = 0; x <= k; x++) {
            for(int y = 0; y <= k; y++) {
                if(s - x - y <= k && s - x - y >= 0)
                    cnt++;
            }
        }

        System.out.println(cnt);
    }
}
/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