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