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

public delegate void nextLoop(int[,] nigger, int lastNum, int finalNum, int corridorCount, int lastLoop1, int lastLoop2);

class Program
{
    static void Main(string[] args)
    {
        int n = 0;
        try
        {
            if (!int.TryParse(Console.ReadLine(), out n) || n > 10 || n < 1)
                throw new ArgumentException("are you fucking retarded");
        }
        catch (Exception ex)
        {
            Console.WriteLine(ex.Message);
        }

        int[,] ninja = new int[n, n];
        Methods.NumSnailLoop(ninja, 0, n * n, 1, 0, 0);

        for (int i = 0; i < ninja.GetLength(0); i++)
        {
            for (int j = 0; j < ninja.GetLength(0); j++)
                Console.Write(ninja[i, j] + " ");
            Console.WriteLine();
        }
    }
}

static class Methods
{
    static public event nextLoop Reactionary = NumSnailLoop;

    public static void NumSnailLoop(int[,] nigger, int lastNum, int finalNum, int corridorCount, int lastLoop1, int lastLoop2)
    {
        if (corridorCount % 2 == 1)
        {
            int i;
            if (lastLoop2 < nigger.GetLength(0) - 1)
                for (i = lastLoop2; i < nigger.GetLength(0); i++)
                {
                    if (nigger[lastLoop1, i] == 0)
                    {
                        lastNum += 1;
                        nigger[lastLoop1, i] = lastNum;
                    }
                    else break;
                }
            else
                for (i = lastLoop2 - 1; i >= 0; i--)
                {
                    if (nigger[lastLoop1, i] == 0)
                    {
                        lastNum += 1;
                        nigger[lastLoop1, i] = lastNum;
                    }
                    else break;
                }

            if (lastNum - 1 < finalNum)
                if (lastLoop1 + 1 < nigger.GetLength(0))
                    Reactionary(nigger, lastNum, finalNum, corridorCount + 1, lastLoop1 + 1, i - 1);
                else
                    Reactionary(nigger, lastNum, finalNum, corridorCount + 1, lastLoop1, i + 1);
        }
        else
        {
            int i;
            if (lastLoop1 < nigger.GetLength(0) - 1)
                for (i = lastLoop1; i < nigger.GetLength(0); i++)
                {
                    if (nigger[i, lastLoop2] == 0)
                    {
                        lastNum += 1;
                        nigger[i, lastLoop2] = lastNum;
                    }
                    else break;
                }
            else
                for (i = lastLoop1 - 1; i >= 0; i--)
                {
                    if (nigger[i, lastLoop2] == 0)
                    {
                        lastNum += 1;
                        nigger[i, lastLoop2] = lastNum;
                    }
                    else break;
                }

            if (lastNum - 1 < finalNum)
                if (lastLoop2 + 1 < nigger.GetLength(0))
                    Reactionary(nigger, lastNum, finalNum, corridorCount + 1, i - 1, lastLoop2 + 1);
                else
                    Reactionary(nigger, lastNum, finalNum, corridorCount + 1, i - 1, lastLoop2);
        }
    }
}