/* -*- coding: utf-8 -*-
 *
 * 401.cc: No.401 数字の渦巻き - yukicoder
 */

#include<cstdio>
#include<cstdlib>
#include<cstring>
#include<cmath>
#include<iostream>
#include<string>
#include<vector>
#include<map>
#include<set>
#include<stack>
#include<list>
#include<queue>
#include<deque>
#include<algorithm>
#include<numeric>
#include<utility>
#include<complex>
#include<functional>
 
using namespace std;

/* constant */

const int MAX_N = 30;
const int dxs[] = {1, 0, -1, 0}, dys[] = {0, 1, 0, -1};

/* typedef */

/* global variables */

int as[MAX_N][MAX_N];

/* subroutines */

/* main */

int main() {
  int n;
  cin >> n;
  int nn = n * n;

  int x = -1, y = 0, di = 0;
  for (int i = 1; i <= nn; i++) {
    int x0 = x + dxs[di], y0 = y + dys[di];
    if (x0 < 0 || x0 >= n || y0 < 0 || y0 >= n || as[y0][x0]) {
      di = (di + 1) & 3;
      x0 = x + dxs[di], y0 = y + dys[di];
    }
    x = x0, y = y0;
    as[y][x] = i;
  }

  for (int y = 0; y < n; y++) {
    for (int x = 0; x < n; x++) {
      if (x) putchar(' ');
      printf("%03d", as[y][x]);
    }
    putchar('\n');
  }
  return 0;
}