import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int k = Integer.parseInt(sc.next());
        int s = Integer.parseInt(sc.next());

        int res = 0;

        for (int x = 0; x <= k; x++) {
            for (int y = 0; y <= k; y++) {
                int z = s - (x + y);
                if (0 <= z && z <= k) {
                    res++;
                }
            }
        }

        System.out.println(res);
    }
}

/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