#include<iostream>
using namespace std;
int main()
{
	int N;
	cin >> N;
	int width, height;
	int **A = new int*[N];
	for (int i = 0; i < N; i++)A[i] = new int[N];
	for (int i = 0; i < N; i++) {
		for (int j = 0; j < N; j++) {
			A[i][j] = 0;
		}
	}
	bool mov_fl[4] = {true,false,false,false};
	width = height = 0;
	int cnt = 1;
	int fill[4] = {0,0,0,0};
	
	while (1) {
		if (mov_fl[0]) {
			A[width][height] = cnt;
			if (width == N - fill[1] - 1) {
				mov_fl[0] = false;
				mov_fl[1] = true;
				fill[0] += 1;
			}
			else width++;
		}
		if (mov_fl[1]) {
			A[width][height] = cnt;
			if (height == N - fill[3] - 1) {
				mov_fl[1] = false;
				mov_fl[2] = true;
				fill[1] += 1;
			}
			else height++;
		}
		if (mov_fl[2]) {
			A[width][height] = cnt;
			if (width == fill[2]) {
				mov_fl[2] = false;
				mov_fl[3] = true;
				fill[2] += 1;
			}
			else width--;
		}
		if (mov_fl[3]) {
			A[width][height] = cnt;
			if (height == fill[0]) {
				mov_fl[3] = false;
				mov_fl[0] = true;
				fill[3] += 1;
				width++;
			}
			else height--;
		}
		cnt++;
		if (cnt == N*N+1)break;
	}
	for (int i = 0; i < N; i++) {
		for (int j = 0; j < N; j++) {
			cout.width(3);
			cout.fill('0');
			cout << A[j][i]<<' ';
		}
		cout << endl;
	}
	return 0;
}