import java.util.*;

// UVa 11504

public class Main {

	public static void main(String[] args) {
		Scanner in = new Scanner(System.in);
		
		int k = in.nextInt();
		int s = in.nextInt();
		
		int answer = 0;
		for (int x = 0; x <= k; x++) {
			for (int y = x; y <= k; y++) {
				int z = s - y - x;
				if (y <= z && z <= k) {
					if (x == y && y == z && x == z) {
						answer += 1;
					} else if (x == y || y == z || x == z) {
						answer += 3;
					} else {
						answer += 6;
					}
				}
			}
		}
		System.out.println(answer);
	}
}
/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