import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int k = sc.nextInt();
		int s = sc.nextInt();
		int count = 0;
		
		for(int x = 0;x <= k && x <= s;x++) {
			for(int y = 0;y <= k && y <= s;y++) {
				int z = s - x - y;
				if(z >= 0 && z <= k) {
					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