import java.util.Scanner;
import java.util.Set;

public class Main{
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int k = Integer.parseInt(sc.next());
        int s = Integer.parseInt(sc.next());
        int cnt=0;
        for(int x=0;x<=k;x++){
            for(int y=0;y<=k;y++){
                int z = s-(x+y);
                if(z>=0 && z<=k){cnt++;}
            }
        }
        System.out.println(cnt);
    }
}
/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