import java.util.*;
import java.io.*;

public class Main {
    public static void main(String[] args) throws IOException {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        String str[]=br.readLine().split(" ");
        int k=Integer.parseInt(str[0]);
        int s=Integer.parseInt(str[1]);
        
        int result=0;
        
        for(int i=0;i<=k;i++){
            for(int j=0;j<=k;j++){
                if(s-i-j>=0&&s-i-j<=k)
                    result++;
            }
        }
        
        System.out.println(result);
    }
}

/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