import java.util.*;
public class Main {
//3つの整数の合計
	public static void main(String[] args) {
		int k, s, l, cnt = 0;
		Scanner sc = new Scanner(System.in);
		k = sc.nextInt();
		s = sc.nextInt();
		for(int i = 0; i <= k; i++)
		{
			for(int j = 0; j <= k; j++)
			{
				l = s - (i + j);
				if(l >= 0 && l <= k) 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