(SPOJ) 3742 - Feynman - Solução

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

class Main {
    public static void main(String[] args) throws NumberFormatException, IOException {
        Main processando = new Main();
        processando.processa();
       
        System.exit(0);
    }
       
    void processa() throws NumberFormatException, IOException {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(System.out));

        String valor = br.readLine();
        int vInt = Integer.parseInt(valor);
        while(vInt != 0) {
            int resultado = (vInt*(vInt+1)*(vInt+vInt+1))/6;

            bw.write(resultado+"\n");
            valor = br.readLine();
            vInt = Integer.parseInt(valor);
        }
       
        bw.flush();
        bw.close();
        return;
    }
}