using System;
class SpiralMatrix
{
    static void Main(string[] args)
    {
        int n = int.Parse(Console.ReadLine());
        int[,] spiralMatrix = new int[n, n];

        int changerRight = 1;
        int changerDown = 1;
        int changerLeft = 0;
        int changerUp = 1;
        int rowRight = 0;
        int colRIght = 0;
        int movingNumber = 1;
        int rowDown = 1;
        int rowLeft = n - 1;
        int colLeft = n - 2;
        int rowUp = n - 2;

        bool whenToStop = true;

        do
        {
            whenToStop = false;
            while (colRIght < (n - changerRight) + 1)
            {
                spiralMatrix[rowRight, colRIght] = movingNumber;
                movingNumber++;
                colRIght++;
                whenToStop = true;
            }
            colRIght = changerRight;
            rowRight = changerRight;
            changerRight++;

            while (rowDown <= n - changerDown)
            {
                spiralMatrix[rowDown, n - changerDown] = movingNumber;
                movingNumber++;
                rowDown++;
                whenToStop = true;
            }
            changerDown++;
            rowDown = changerDown;

            while (colLeft >= n - (n - changerLeft))
            {
                spiralMatrix[rowLeft - changerLeft, colLeft] = movingNumber;
                movingNumber++;
                colLeft--;
                whenToStop = true;
            }
            changerLeft++;
            colLeft = (n - 2) - changerLeft;

            while (rowUp >= n - (n - changerUp))
            {
                spiralMatrix[rowUp, 0 + (changerUp - 1)] = movingNumber;
                movingNumber++;
                rowUp--;
                whenToStop = true;
            }
            rowUp = (n - 2) - changerUp;
            changerUp++;

        } while (whenToStop);

        for (int i = 0; i < n; i++)
        {
            for (int p = 0; p < n; p++)
            {
                Console.Write("{0, 6}", spiralMatrix[i, p]);
            }
            Console.WriteLine();
        }
    }
}