import java.util.*;
class Main{
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int max = sc.nextInt();
		int sum = sc.nextInt();
		int result = 0;
		for (int i=0; i<=max; i++) {
			for (int j=0; j<=max; j++) {
				int tmp = sum - i - j;
				if(0 <= tmp && tmp <= max) result++;
			}
			
		}
		System.out.println(Integer.toString(result));
	}

}
/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