using System;

        //Write a program that reads a positive integer number N (N < 20) from console and outputs in the console the numbers
        //1 ... N numbers arranged as a spiral.
        //Example for N = 4
        //        1  2  3 4
        //       12 13 14 5
        //       11 16 15 6
        //       10  9  8 7
class Program
{

    private static int data = 1;

    static void Main()
    {
        int col, row, size;
        size = int.Parse(Console.ReadLine());
        CheckInput(size);
        col = row = size;
        int[,] matrix = new int[col, row];
        SetMatrixToZero(matrix, col, row);

        while (true)
        {
            matrix = Right(matrix, col, row);
            matrix = Down(matrix, col, row);
            matrix = Left(matrix, col, row);
            matrix = Up(matrix, col, row);
        }
    }

    private static int[,] Up(int[,] matrix, int col, int row)
    {
        for (int x = 0; x < col; x++)
        {
            for (int y = 0; y < row; y++)
            {
                if (matrix[x, y] == 0 && matrix[x, y + 1] > 0 && x == 0) //first
                {
                    matrix[x, y] = data;
                    CheckData(matrix, col, row);
                    data++;
                    for (int i = y - 1; i >= 0; i--)
                    {
                        if (matrix[x, i] == 0)
                        {
                            matrix[x, i] = data;
                            CheckData(matrix, col, row);
                            data++;
                        }
                        if (i == 0)
                        {
                            return matrix;
                        }
                        if (matrix[x, i - 1] > 0)
                        {
                            return matrix;
                        }
                    }
                }
                if (matrix[x, y] == 0 && matrix[x, y + 1] > 0 && matrix[x - 1, y] > 0) //second
                {
                    matrix[x, y] = data;
                    CheckData(matrix, col, row);
                    data++;
                    for (int i = y - 1; i >= 0; i--)
                    {
                        if (matrix[x, i] > 0)
                        {
                            return matrix;
                        }
                        matrix[x, i] = data;
                        CheckData(matrix, col, row);
                        data++;
                        if (matrix[x, i - 1] > 0)
                        {
                            return matrix;
                        }
                    }
                }
            }
        }
        return matrix;
    }

    private static int[,] Left(int[,] matrix, int col, int row)
    {
        for (int x = 0; x < col; x++)
        {
            for (int y = 0; y < row; y++)
            {
                if (matrix[x, y] == 0 && y == row - 1 && matrix[x + 1, y] > 0) //first
                {
                    matrix[x, y] = data;
                    data++;
                    for (int i = x - 1; i >= 0; i--)
                    {
                        if (matrix[i, y] == 0)
                        {
                            matrix[i, y] = data;
                            data++;
                        }
                        if (i == 0)
                        {
                            return matrix;
                        }
                    }
                }
                if (matrix[x, y] == 0 && matrix[x + 1, y] > 0 && matrix[x, y + 1] > 0) // second
                {
                    matrix[x, y] = data;
                    CheckData(matrix, col, row);
                    data++;
                    for (int i = x - 1; i >= 0; i--)
                    {
                        if (matrix[i, y] > 0)
                        {
                            return matrix;
                        }
                        matrix[i, y] = data;
                        CheckData(matrix, col, row);
                        data++;
                        if (matrix[i - 1, y] > 0)
                        {
                            return matrix;
                        }
                    }

                }

            }
        }
        return matrix;
    }

    private static int[,] Down(int[,] matrix, int col, int row)
    {
        for (int x = 0; x < col; x++)
        {
            for (int y = 0; y < row; y++)
            {
                if (matrix[x, y] == 0 && x == col - 1) //first
                {
                    matrix[x, y] = data;
                    CheckData(matrix, col, row);
                    data++;
                    for (int i = y + 1; i < row; i++)
                    {
                        if (matrix[x, i] > 0)
                        {
                            return matrix;
                        }
                        matrix[x, i] = data;
                        CheckData(matrix, col, row);
                        data++;
                        if (i == row - 1)
                        {
                            return matrix;
                        }
                    }
                }

                if (matrix[x, y] == 0 && matrix[x + 1, y] > 0 && matrix[x, y - 1] > 0)
                {
                    matrix[x, y] = data;
                    data++;
                    for (int i = y + 1; i < row; i++)
                    {
                        if (matrix[x, i] > 0)
                        {
                            return matrix;
                        }
                        matrix[x, i] = data;
                        data++;
                        if (i == row)
                        {
                            return matrix;
                        }
                    }
                }
            }
        }
        return matrix;
    }

    private static void PrintMatrix(int[,] matrix, int col, int row)
    {
        Console.Clear();
        for (int x = 0; x < col; x++)
        {
            for (int y = 0; y < row; y++)
            {
                Console.SetCursorPosition(x * 3, y);
                Console.Write(matrix[x, y]);
            }
        }
    }

    private static void SetMatrixToZero(int[,] matrix, int col, int row)
    {
        for (int x = 0; x < col; x++)
        {
            for (int y = 0; y < row; y++)
            {
                matrix[x, y] = 0;
            }
        }
    }

    private static int[,] Right(int[,] matrix, int col, int row)
    {
        for (int x = 0; x < col; x++)
        {
            for (int y = 0; y < row; y++)
            {
                if (matrix[x, y] == 0 && data == 1) //first time
                {
                    matrix[x, y] = data;
                    data++;
                    for (int i = y + 1; i < col; i++)
                    {
                        matrix[i, y] = data;
                        data++;
                        if (i < col - 1)
                        {
                            if (matrix[i + 1, y] > 0)
                            {
                                return matrix;
                            }
                        }
                        if (i + 1 == col)
                        {
                            return matrix;
                        }
                    }
                }
                if (matrix[x, y] == 0 && matrix[x - 1, y] > 0 && matrix[x, y - 1] > 0) //second time
                {
                    matrix[x, y] = data;
                    CheckData(matrix, col, row);
                    data++;
                    for (int i = x + 1; x < col; i++)
                    {
                        if (matrix[i, y] > 0)
                        {
                            return matrix;
                        }
                        matrix[i, y] = data;
                        CheckData(matrix, col, row);
                        data++;
                        if (matrix[i + 1, y] > 0)
                        {
                            return matrix;
                        }
                    }
                }
            }
        }
        return matrix;
    }

    private static void CheckData(int[,] matrix, int col, int row)
    {
        if (data == col * col)
        {
            PrintMatrix(matrix, col, row);
            Environment.Exit(0);
        }
    }

    private static void CheckInput(int size)
    {
        if (size < 0 || size > 19)
        {
            Console.WriteLine("Wrong data!");
            Environment.Exit(0);
        }
    }

}