import java.io.IOException;
import java.util.Scanner;

public class Main {

	public static void main(String[] args) throws IOException {
		Scanner scanner = new Scanner(System.in);
		int k = scanner.nextInt()+1;
		int s = scanner.nextInt();
		int count = 0;
		for(int i = 0; i < k; i++){
			for(int j = 0; j < k; j++){
				int a = s - (i+j);
				if(a <= k-1 && a >= 0){
					count++;
				}
			}
		}
		System.out.println(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