using System;
using System.Linq;

class No401
{
    static void Main()
    {
        var num = Int32.Parse(Console.ReadLine());
        var d = 0;
        var x = 0;
        var y = 0;
        var ansArray = new int[num, num];
        for (int i = 0; i < num; ++i)
        {
            for (int j = 0; j < num; ++j)
            {
                ansArray[i, j] = 0;
            }
        }
        for (int i = 1; i <= num * num; ++i)
        {
            switch (d)
            {
                case 0:
                    ansArray[x, y] = i;
                    if (x + 1 >= num || ansArray[x + 1, y] != 0)
                    {
                        d = 1;
                        y++;
                    }
                    else x++;
                    break;
                case 1:
                    ansArray[x, y] = i;
                    if (y + 1 >= num || ansArray[x, y + 1] != 0)
                    {
                        d = 2;
                        x--;
                    }
                    else y++;
                    break;
                case 2:
                    ansArray[x, y] = i;
                    if (x - 1 < 0 || ansArray[x - 1, y] != 0)
                    {
                        d = 3;
                        y--;
                    }
                    else x--;
                    break;
                case 3:
                    ansArray[x, y] = i;
                    if (y - 1 < 0 || ansArray[x, y - 1] != 0)
                    {
                        d = 0;
                        x++;
                    }
                    else y--;
                    break;
            }
        }
        for (y = 0; y < num; ++y)
        {
            for (x = 0; x < num; ++x)
            {
                Console.Write("{0:000}",ansArray[x, y]);
                if (x != num - 1) Console.Write(' ');
            }
            Console.WriteLine();
        }
    }
}