using System;
public class Program
{
public static void Main()
int i, j, n;
Console.Write("n: ");
n = int.Parse(Console.ReadLine());
for(i = 1, n = 5; i <= n * 2 - 1; Console.WriteLine(), i++)
for(j = 1; j <= n * 2 - 1; Console.Write(Math.Max(Math.Abs(n - i), Math.Abs(n - j)) + 1), j++);
}