import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int k = sc.nextInt();
		int s = sc.nextInt();

		if (3 * k < s) {
			System.out.println("");
			System.exit(0);
		}

		int r = 0;
		for (int x = 0; x <= k; x++) {
			for (int y = 0; y <= k && y <= s - x; y++) {
				if (0 <= s - x - y && s - x - y <= k) {
					r++;
				}
			}
		}
		System.out.println(r);

	}

}

/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