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 i = 0 ; i <= K ; i++ ) {
            for (int j = 0 ; j <= K ; j++ ) {
                if (S - i - j >= 0  && S - i - j <= 3 * K && S - i - j <= 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