one of possible solutions for https://www.facebook.com/programminglearners/posts/506757269358735 1 232 34543 4567654

gistfile1.cs

using System;

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            int n = 5;

            for (int i = 1; i <= n; i++)
            {
                int localSum = (2 * i - 1) * (int)Math.Pow(10, i - 1);
                for (int k = 0; k < i - 1; k++)
                {
                    localSum += (i + k) * (int)Math.Pow(10, 2 * (i - 1) - k);
                    localSum += (i + k) * (int)Math.Pow(10, k);
                }
                Console.WriteLine(localSum);
            }
        }
    }
}

Developer's note:
I've wrote this just for fun. BE CAREFUL, this code is NOT EFFICIENT since it contains Math.Pow()