#include<bits/stdc++.h>
using namespace std;
int cnt,b = 1,t = 1,a[21][21];
int main() {
	int n;
	cin >> n;
	cnt = n;
	while (true) {
		if (n == 0) {
			break;
		}
		for (int i = t;i <= n; i++) {
			a[i][n] = b++;
		}
		for (int i = n - 1;i >= t; i--) {
            a[n][i] = b++;
		}
		for (int i = n - 1;i >= t; i--) {
			a[i][t] = b++;
		}
		for (int i = t + 1;i <= n - 1; i++) 
		{
			a[t][i] = b++;
		}
		n--;
		t++;
	}
	for (int i = 1;i <= cnt; i++) {
		for (int j = 1;j <= cnt; j++) {
			cout << a[i][j] << " ";
		}
		cout << endl;
	}
	return 0;
}