using System;

public class Program

{

    public static void Main()

    {

         Console.WriteLine("Perpangkatan 3");

         int nomor;

            double angka;

            angka = 1;

            for (nomor = 1; nomor <= 20; nomor++ )

            {

                angka = angka * 3;

                Console.WriteLine(nomor + "\t" + angka);

            }

    }

}