using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

using System.Numerics;

namespace yukikoda
{
    class Program
    {
        static void Main(string[] args)
        {
            int n = int.Parse(Console.ReadLine());
            string[,] a = new string[n, n];

            int x = -1;
            int y = 0;
            int b = n;
            int m = 1;
            int cnt = 0;

            while (m <= n * n)
            {
                //右
                cnt = 0;
                while (cnt < b)
                {
                    x++;
                    a[x, y] = m.ToString("000");
                    m++;
                    cnt++;
                }

                //下
                b = b - 1;
                cnt = 0;
                while (cnt < b)
                {
                    y++;
                    a[x, y] = m.ToString("000");
                    m++;
                    cnt++;
                }

                //左
                cnt = 0;
                while (cnt < b)
                {
                    x--;
                    a[x, y] = m.ToString("000");
                    m++;
                    cnt++;
                }

                //上
                b = b - 1;
                cnt = 0;
                while (cnt < b)
                {
                    y--;
                    a[x, y] = m.ToString("000");
                    m++;
                    cnt++;
                }
            }



            string ans = "";

            for (int i = 0; i < n; i++)
            {
                ans = "";
                for (int j = 0; j < n; j++)
                {
                    ans += a[j, i] + " ";
                }
                ans = ans.Substring(0, ans.Length - 1);
                Console.WriteLine(ans);
            }
        }
    }
}