using System;

​

public class Program

{

    public static void Main()

    {

        int[, ] multiplicationtable = new int[13, 13];

        for (int i = 0; i < 13; i++) //This establishes the first row and first column

        {

            multiplicationtable[0, i] = i;

            multiplicationtable[i, 0] = i;

        }

​

        for (int i = 1; i < 13; i++)

        {

            for (int j = 1; j < 13; j++)

            {

                multiplicationtable[i, j] = i * j;

            }

        }

        for(int i=0; i<multiplicationtable.GetLength(0);i++)

        {for(int j =0;j<multiplicationtable.GetLength(1);j++)

        {Console.Write(multiplicationtable[i,j] + "   ");}

         Console.WriteLine();

        }

    }

}