#define _USE_MATH_DEFINES
#include<stdio.h>
#include<string>
#include<iostream>
#include<cctype>
#include<cstdio>
#include<vector>
#include<stack>
#include<queue>
#include <algorithm>
#include<math.h>
#include<set>
#include<map>
#include<iomanip>

//#include<bits/stdc++.h>



using namespace std;


int r[50][50];
int main() {
	int n;
	cin >> n;
	int s = 1;
	int p = n-1;
	int x = 0, y = 0, d = 0;
	if (n == 1) {
		cout << "001" << endl;
		return 0;
	}
	while (s <= n*n) {
		d %= 4;
		for (int i = 0; i < p; i++) {
			if (r[y][x])break;
			if (d == 0)r[y][x] = s, x++;
			if (d == 1)r[y][x] = s, y++;
			if (d == 2)r[y][x] = s, x--;
			if (d == 3)r[y][x] = s, y--;
			s++;
			
	//		cout << x << " " << y << endl;

		}
		if (r[y][x]) {
			if(d==3)y++, x++;
			if (d == 2)y--, x++;
			if (d == 1)y--, x--;
			if (d == 0)y++, x--;
		}
		d++;
		
		if (d == 4)p--;
	}
	for (int i = 0; i < n; i++) {
		for (int j = 0; j < n; j++) {
			if (j)cout << " ";
			if (r[i][j] < 10)cout << "00";
			else if (r[i][j] < 100)cout << 0;
			printf("%d",r[i][j]);		}
		cout << endl;
	}
	return 0;


}