import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.IOException;

public class Main{
	public static void main(String[] args) throws IOException {
		BufferedReader br = new BufferedReader(
			new InputStreamReader(System.in));
		String[] input = br.readLine().split(" ");
		int k = Integer.parseInt(input[0]);
		int s = Integer.parseInt(input[1]);
		int x=0;
		int y=0; 
		int z=0;
		int count = 0;

		for(int i = 0; i <= k;i++){
			x = i;
			for(int j = 0; j <= k; j++){
				y = j;
				int rest = s-x-y;
				if(rest >= 0 && rest <= 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