import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int k = sc.nextInt();
		int s = sc.nextInt();
		
		int cnt = 0;
		for (int x = 0; x <= k && x <= s; x++) {
			for (int y = 0; y <= k && x + y <= s; y++) {
				if (s - x - y <= k) cnt++;
			}
		}
		
		System.out.println(cnt);
		
		sc.close();
	}
	
}



/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