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();
		int count = 0;

		for (int x = Math.max(0, s - 2 * k); x <= k; x++) {
			for (int y = Math.max(0, s - k - x); y <= Math.min(k, s - x); y++) {
				//int z = s - x - y;
				//System.out.println(x + "," + y + "," + z);
				count++;
			}
		}
		System.out.println(count);
	}
}
/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