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 ans = 0;
		for (int x = 0; x <= k; x++)
			for (int y = 0; y <= k; y++)
				if (s - x - y >= 0 && s - x - y <= 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