import java.util.Scanner;

public class Main {
	void run() {
		Scanner sc = new Scanner(System.in);

		int k = sc.nextInt();
		int s = sc.nextInt();
		int count = 0;
		for (int a = 0; a <= k; a++) {
			for (int b = 0; b <= k; b++) {
				int c = s - a - b;
				if (0 <= c && c <= k) {
					count++;
				}
			}
		}
		System.out.println(count);
	}

	public static void main(String[] args) {
		new Main().run();
	}
}

/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