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());
		sc.close();
		int cnt = 0;
		for(int X = 0;X <= K;X++) {
			for(int Y = 0;Y <= K;Y++) {
				if(S - X - Y <= K && S - X - Y >= 0) {
					cnt++;
				}
			}
		}
		System.out.println(cnt);
	}
}
/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