using System;

​

public class Math

{

    private int jumlah_angka;

    public int JumlahAngka{

        set { jumlah_angka = value; }

        get { return jumlah_angka; }

    }

    public void Hitung2(){

        for(int a = 0; a< jumlah_angka ;a++){

            //Bilangan ganjil

            if(a % 2 == 1)   

            {

                Console.Write((((a / 2)+1) * 3) + " ");  

            }

            else

            {       //bilangan genap

                Console.Write((((a / 2)+1 ) * 2) + " "); //0=2 1=3 2 = 4 3=6 4=6 5=9 6=8 7=12 8=10 9=15 

            }

        }

    }

}

public class Program

{

    public static void Main()

    {

        Math obj_math = new Math();

        Console.WriteLine("Input X Number ");

        int jumlah_angka = Convert.ToInt16(Console.ReadLine());

        obj_math.JumlahAngka = jumlah_angka;

        obj_math.Hitung2();

    }

}

​

​