#include "bits/stdc++.h"
using namespace std;

//諸機能
#pragma region MACRO 
#define putans(x)  std::cerr << "answer: " ; cout << (x) << endl
#define dputans(x) std::cerr << "answer: "; cout << setprecision(10) << (double)(x) << endl
#define REP(i,a,n) for(int i=(a); i<(int)(n); i++)
#define RREP(i,a,n) for(int i=(int)(n-1); i>= a; i--)
#define rep(i,n) REP(i,0,n)
#define rrep(i,n) RREP(i,0,n)
#define all(a) begin((a)),end((a))
#define mp make_pair
#define exist(container, n) ((container).find((n)) != (container).end())
#define substr(s,i,l) string((s), (i), (l))
#define tos(x) (to_string((x)))
#ifdef _DEBUG //ファイルからテストデータを読み込む
std::ifstream ifs("data.txt");
#define put ifs >>
#else //いい感じにやる
#define put cin >>
#endif
#pragma endregion
//デバッグなどの支援
#pragma region CODING_SUPPORT
#define dbg(var0) { std::cerr << ( #var0 ) << "=" << ( var0 ) << endl; }
#define dbg2(var0, var1) { std::cerr << ( #var0 ) << "=" << ( var0 ) << ", "; dbg(var1); }
#define dbg3(var0, var1, var2) { std::cerr << ( #var0 ) << "=" << ( var0 ) << ", "; dbg2(var1, var2); }
#define dbgArray(a,n) {std::cerr << (#a) << "=";  rep(i,n){std::cerr <<(a[i])<<",";} cerr<<endl;} 
#ifndef _DEBUG
#define dbg1 {}
#define dbg2 {}
#define dbg3 {}
#define dbgArray {}
#endif 
#pragma endregion 
//typedef（書き換える、書き足す可能性ある）
#pragma region TYPE_DEF
typedef long long ll;
typedef pair<int, int> pii; typedef pair<string, string> pss; typedef pair<int, string>pis;
typedef vector<string> vs; typedef vector<int> vi;
#pragma endregion
//諸々の定数(書き換える可能性ある)
#pragma region CONST_VAL
#define PI (2*acos(0.0))
#define EPS (1e-9)
#define MOD (ll)(1e9 + 7)
#define INF (ll)(1e9)
#pragma endregion



int main() {
	int n; put n;
	string mat[30][30];
	fill(*mat, *mat + 30 * 30, "nul");
	int i = 0;
	int j = 0;
	int k = 1;
	int turn = 0;
	int vx[] = { 0,1,0,-1 };
	int vy[] = { 1,0,-1,0 };
	auto step = [&]()->void {turn++; turn %= 4; };

	mat[0][0] = "001";
	while (k < n*n) {
		int nextx = i + vx[turn];
		int nexty = j + vy[turn];
		if (nextx >= n || nextx < 0) {
			step();
			continue;
		}
		if (nexty >= n || nexty < 0) {
			step();
			continue;
		}
		if (mat[nextx][nexty] != "nul") {
			step();
			continue;
		}
		k++;
		i = nextx;
		j = nexty;
		string ks = to_string(k);
		string m(( 3 - ks.size() ), '0');
		mat[nextx][nexty] = ( m + ks );
	}
	rep(i, n) {
		rep(j, n - 1) {
			cout << mat[i][j] << " ";
		}
		cout << mat[i][n - 1] << endl;
	}
END:
	return 0;
}