#include <iostream>
#include <vector>
#include <string>
using namespace std;
vector<int> dy = {0, 1, 0, -1};
vector<int> dx = {1, 0, -1, 0};
int main(){
	int N;
	cin >> N;
	vector<vector<string>> ans(N + 2, vector<string>(N + 2, "#"));
	for (int i = 1; i <= N; i++){
		for (int j = 1; j <= N; j++){
			ans[i][j] = ".";
		}
	}
	int y = 1;
	int x = 1;
	int d = 0;
	for (int i = 1; i <= N * N; i++){
		string S = to_string(i);
		while (S.size() < 3){
			S = '0' + S;
		}
		if (ans[y + dy[d]][x + dx[d]] != "."){
			d++;
			if (d == 4){
				d = 0;
			}
		}
		y += dy[d];
		x += dx[d];
		ans[y][x] = S;
	}
	for (int i = 1; i <= N; i++){
		for (int j = 1; j <= N; j++){
			cout << ans[i][j];
			if (j < N){
				cout << ' ';
			}
		}
		cout << endl;
	}
}