import java.util.Scanner;
public class Main {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Scanner sc = new Scanner(System.in);
		int count=0;
		int k = sc.nextInt();
		int s = sc.nextInt();
		for(int i=0;i<=k;i++) {
			for(int w=0;w<=k;w++) {
				if(s-i-w>=0 && s-i-w<=k) {
					count++;
				}
			}
		}
		System.out.print(count);
	}
}

/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