class fillTheMatrix_a
{
    static void Main()
    {
       Console.WriteLine("Enter the n for a matrix(n,n):");
       int n=int.Parse(Console.ReadLine());
       int[,] matrixA=new int[n,n];
       for (int i = 0; i < n; i++)
       {
           for (int j = 0; j < n; j++)
           {
               matrixA[i, j] = i + 1 + n*j;
               Console.Write("{0,3}",matrixA[i,j]);
           }
           Console.WriteLine();
       }
       Console.WriteLine();
    }
}