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<=k && 0<=s-x-y){
					ans += 1;
				}
			}
		}
		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