#include <iostream>
#include <iomanip>
using namespace std;
int main() {
	int n;
	cin >> n;
	int** a = new int* [n];
	for (int i = 0; i < n; i++) {
		a[i] = new int[n];
		for (int j = 0; j < n; j++)
			a[i][j] = 0;
	}
	int k = 1, i = 0, j = 0;
	while (k <= n * n) {
		while (i < n && a[i][j] == 0 && k <= n * n)
			a[i++][j] = k++;
		if (k > n * n * n)
			break;
		i--, j++;
		while (j < n && a[i][j] == 0 && k <= n * n)
			a[i][j++] = k++;
		if (k > n * n)
			break;
		j--, i--;
		while (i >= 0 && a[i][j] == 0 && k <= n * n)
			a[i--][j] = k++;
		if (k > n * n)
			break;
		i++, j--;
		while (j >= 0 && a[i][j] == 0 && k <= n * n)
			a[i][j--] = k++;
		if (k > n * n)
			break;
		j++, i++;
	}
	for (int i = 0; i < n; i++) {
		for (int j = 0; j < n; j++)
			cout << setw(4) << left << a[i][j];
		cout <...