#include <bits/stdc++.h>
#define PI 3.14159265359
using namespace std;
const int64_t MOD = 1e9 + 7;

int main() {
	int N;
	cin >> N;

	vector<vector<string>> v(N, vector<string>(N));
	int c = 1;
	int d = 0;
	int i, j;
	i = 0;
	j = 0;

	int all = N * N;
	while (all) {
		string s = to_string(c);
		while (s.size() < 3) {
			s = '0' + s;
		}
		v.at(i).at(j) = s;
		c++;
		all--;

		if (d % 4 == 0) {
			if (j == N - 1) d++;
			else if (v.at(i).at(j + 1) != "") d++;
		}
		else if (d % 4 == 1) {
			if (i == N - 1) d++;
			else if (v.at(i + 1).at(j) != "") d++;
		}
		else if (d % 4 == 2) {
			if (j == 0) d++;
			else if (v.at(i).at(j - 1) != "") d++;
		}
		else if (d % 4 == 3) {
			if (i == 0) d++;
			else if (v.at(i - 1).at(j) != "") d++;
		}

		if (d % 4 == 0) {
			j++;
		}
		else if (d % 4 == 1) {
			i++;
		}
		else if (d % 4 == 2) {
			j--;
		}
		else if (d % 4 == 3) {
			i--;
		}
	}

	for (int i = 0; i < N; i++) {
		for (int j = 0; j < N; j++) {
			cout << v.at(i).at(j);

			if (j != N - 1) {
				cout << ' ';
			}
			else {
				cout << endl;
			}
		}
	}
}