1 import java.io.BufferedReader; 2 import java.io.InputStreamReader; 3 4 public class Christmas_artur { 5 6 public static void main(String[] args) throws Exception { 7 BufferedReader in = new BufferedReader(new InputStreamReader(System.in)); 8 for (long n = Integer.parseInt(in.readLine()); n != 0; n = Integer.parseInt(in.readLine())) 9 System.out.println(n * (n + 1) / 2 * (n + 2) / 3); 10 } 11 }