#include <bits/stdc++.h>
using namespace std;

int main()
{
	int n;
	cin >> n;
	vector<vector<int>> a(n, vector<int>(n, 0));
	pair<int, int> now(0, 0);
	int dx[] = {0, 1, 0, -1}, dy[] = {1, 0, -1, 0}, p = 0;
	auto inside = [](int a, int b, int alim, int blim) {
		return 0 <= a && a < alim && 0 <= b && b < blim;
	};
	for (int num = 1; num <= n * n; num++)
	{
		a[now.first][now.second] = num;
		if (!inside(now.first + dx[p], now.second + dy[p], n, n) || a[now.first + dx[p]][now.second + dy[p]])
		{
			p++;
			p %= 4;
		}
		now.first += dx[p];
		now.second += dy[p];
	}
	for (auto &i : a)
	{
		for (auto &j : i)
		{
			cout << setw(3) << setfill('0') << j << ' ';
		}
		cout << endl;
	}
	return 0;
}