#include <bits/stdc++.h>

using namespace std;

int dy[4] = { 0,1,0,-1 };
int dx[4] = { 1,0,-1,0 };
int board[31][31];

int main(void)
{
	int n;
	int num = 1;
	int state = 0;
	int move = 0;
	int max = 1;

	memset(board,-1,sizeof(board));

	scanf("%d",&n);

	int y = 0;
	int x = 0;
	int dir = 0;
	while(num<=n*n)
	{
		board[y][x] = num++;
		int ny = y + dy[dir];
		int nx = x + dx[dir];
		if(ny<0 || ny>=n || nx<0 || nx>=n)
		{
			dir++;
			dir%=4;
		}
		else if(board[ny][nx]!=-1)
		{
			dir++;
			dir%=4;
		}
		y += dy[dir];
		x += dx[dir];
	}

	for (int i = 0; i < n; i++)
	{
		for (int j = 0; j < n; j++)
		{
			printf("%03d ",board[i][j]);
		}
		printf("\n");
	}

	return 0;
}