#include "iostream"
using namespace std;

int N;
int num[30][30] = {};
int i = 1;
int dir = 0;
int x, y;


int main() {
	cin >> N;
	num[0][0] = i++;
	while (i <= (N*N)) {
		switch (dir%4) {
		case 0:
			if (num[x + 1][y] == 0&&x+1<N) {
				num[x + 1][y] = i++;
				x++;
			}
			else {
				num[x][y + 1] = i++;
				dir++;
				y++;
			}
			break;
		case 1:
			if (num[x][y+1] == 0&&y+1<N) {
				num[x][y+1] = i++;
				y++;
			}
			else {
				num[x-1][y] = i++;
				dir++;
				x--;
			}
			break;
		case 2:
			if (num[x - 1][y] == 0&&x-1>=0) {
				num[x - 1][y] = i++;
				x--;
			}
			else {
				num[x][y - 1] = i++;
				dir++;
				y--;
			}
			break;
		case 3:
			if (num[x][y - 1] == 0&&y-1>=0) {
				num[x][y - 1] = i++;
				y--;
			}
			else {
				num[x + 1][y] = i++;
				dir++;
				x++;
			}
			break;
		}
	}
	for (int i = 0; i < N; i++) {
		for (int j = 0; j < N; j++) {
			if (j != 0)cout << " ";
			if (num[j][i] < 10)cout << "00" << num[j][i] ;
			else if (num[j][i] < 100)cout << "0" << num[j][i];
			else cout << num[j][i];
		}
		cout << "\n";
	}
	return 0;
	
}