import java.util.*;
import java.io.*;
class Main {
    public static void main(String[] args) throws IOException{
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        StringTokenizer st = new StringTokenizer(br.readLine());

        Integer K = Integer.parseInt(st.nextToken());
        Integer S = Integer.parseInt(st.nextToken());
        long ans=0;
        for (int i=0; i<=K; i++) {

            for (int j=0; j<=K; j++) {
                if(i+j>S)
                    continue;
                if(S-i-j<=K)
                    ans++;
            }
        }
        System.out.println(ans);
        
    }

}

/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