using System;

​

public class Program

{

    public static void Main()

    {

        //Silvana CháveZ

        int p;

        int num = 3;

        Console.WriteLine("3, 10, 31, 94, 283...");

        Console.WriteLine("What position of the previous series would you like to know?");

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

        for (int i = 3; 1< p; i++)

        {

            num = 3*num + 1;

        }

        Console.WriteLine(num);

        }

}

​

​