#define _CRT_SECURE_NO_WARNINGS // #pragma warning(disable:4996)
#include <iostream>
#include <algorithm>
#include <vector>
#include <string>
#include <queue>
#include <functional>
#include <sstream>
#include <cmath>
using namespace std; 

#define rep(i,a,b) for(int i=(a);i<(b);i++)
#define pb push_back
#define mp(a,b) make_pair(a,b)
#define all(a) a.begin(),a.end()

typedef pair<int, int> Pii;
typedef vector<int> V;
typedef long long ll;
const int inf = 2e9;
const int mod = 1e9 + 7;
const int MAX_N = 202020;

int dx[4] = {1,0,-1,0}; // R D L U
int dy[4] = {0,1,0,-1};
int A[31][31];

int main()
{
	int N;
	cin >> N;

	fill(A[0], A[31], 999);
	rep(i,0,N) rep(j,0,N) A[i][j] = 0;

	int cy = 0, cx = 0;
	int d = 0;

	rep(i,1,N*N+1) {
		A[cy][cx] = i;
		if (A[cy+dy[d]][cx+dx[d]]!=0) d = (d+1)%4;
		cy += dy[d];
		cx += dx[d];
	}

	rep(i,0,N) {rep(j,0,N) printf("%03d ", A[i][j]); cout << endl; }

	return 0;
}