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