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

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

            int[,] matrx = new int[n, n];

            int rows = 0;
            int collumns = 0;
            string move = "right";

            int maxNumber = n * n;

            for (int i = 1; i <= maxNumber; i++)
            {
                if (move == "right" && (collumns > n - 1 || matrx[rows, collumns] != 0))
                {
                    move = "down";
                    collumns--;
                    rows++;
                }
                if (move == "down" && (rows > n - 1 || matrx[rows, collumns] != 0))
                {
                    rows--;
                    collumns--;
                    move = "left";
                }
                if (move == "left" && (collumns < 0 || matrx[rows, collumns] != 0))
                {
                    move = "up";
                    collumns++;
                    rows--;
                }

                if (move == "up" && (rows < 0 || matrx[rows, collumns] != 0))
                {
                    move = "right";
                    rows++;
                    collumns++;

                }
                matrx[rows, collumns] = i;
                if (move == "right")
                {
                    collumns++;
                }
                if (move == "down")
                {
                    rows++;
                }
                if (move == "left")
                {
                    collumns--;
                }
                if (move == "up")
                {
                    rows--;
                }


            }

            for (int x1 = 0; x1 < n; x1++)
            {
                for (int x2 = 0; x2 < n; x2++)
                {
                    Console.Write("{0,4}", matrx[x1, x2] );
                }
                Console.WriteLine();
            }
            Console.WriteLine();



        }
    }
}