
import java.util.Scanner;

public class Main {

    private static Scanner scan = new Scanner(System.in);

    public static void main(String[] args) {
	int K = Integer.parseInt(scan.next());
	int S = Integer.parseInt(scan.next());

	int count = 0;
	for (int i = 0; i <= K; i++) {
	    int XY = S - i;
	    if(XY < 0) break;
	    if(XY <= 2 * K) {
		for (int j = 0; j <= K; j++) {
		    int X = XY - j;
		    if(X < 0) break;
		    if(X <= K) count++;
		}
	    }
	}

	System.out.println(count);
	scan.close();
    }
}

/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