using System;

public class Program
{
	public static void Main()
	{
		int N = int.Parse(Console.ReadLine());
		int[,] grid = new int[N, N];
		int[,] move = {{1, 0}, {0, 1}, {-1, 0}, {0, -1}};
		int[] pos = {0, 0};
		int moveId = 0;
		for (int i = 0; i < N; i++)
		{
			for (int j = 0; j < N; j++)
			{
				grid[i, j] = 0;
			}
		}
		for (int i = 1; i <= N * N; i++)
		{
			grid[pos[0], pos[1]] = i;
			if (pos[0] + move[moveId, 0] < 0 || N <= pos[0] + move[moveId, 0] ||
				pos[1] + move[moveId, 1] < 0 || N <= pos[1] + move[moveId, 1] ||
				grid[pos[0] + move[moveId, 0], pos[1] + move[moveId, 1]] > 0)
			{
				moveId = (moveId + 1) % 4;
			}
			pos[0] += move[moveId, 0];
			pos[1] += move[moveId, 1];
		}
		for (int i = 0; i < N; i++)
		{
			for (int j = 0; j < N; j++)
			{
				Console.Write("{0:000}", grid[j, i]);
				if (j < N - 1)
				{
					Console.Write(' ');
				}
			}
			Console.WriteLine();
		}
	}
}