using System;

public class Program

{

    public static void Main()

    {

        //Louis Ramiro Alicea Hernández

​

    int position;

  int num = 2;

   Console.WriteLine("2, 5, 11, 23, 47…");

   Console.WriteLine("Position");

  position = int.Parse(Console.ReadLine());

  for (int i = 1; i < position; i++)

{

    num = 2*num +1;

}

​

Console.WriteLine(num);

​

    }

}