import java.util.*;

public class Main {
    public static void main(String[] args) throws Exception {
        Scanner sc = new Scanner(System.in);
        long[] map = new long[100002];
        int k = sc.nextInt();
        int s = sc.nextInt();
        int ans = 0;
        for(int i = 0; i <= k; i++){
            for(int j = 0; j <= k; j++){
                if(s-i-j >= 0 && s-i-j <= k){
                    ans++;
                }
            }
        }
        System.out.println(ans);
    }
}

/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