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

using i64 = int64_t;
using u64 = uint64_t;
using vi64 = vector<i64>;
using vu64 = vector<u64>;
using vvi64 = vector<vi64>;
using vvu64 = vector<vu64>;

#define rep(i,n) for(int i=0, i##_len=(n); i<i##_len; ++i)
#define ALL(x) (x).begin(),(x).end()
#define RALL(obj) (obj).rbegin(),(obj).rend()
#define SZ(x) ((int)(x).size())
#define PRINT(n) cout << (n) << "\n";

int dx[4] = {1, 0, -1, 0};
int dy[4] = {0, 1, 0, -1};

void YESorNO(bool p) {
  cout << (p ? "YES" : "NO") << endl;
  return;
}

void run() {
  int n;
  cin >> n;
  vvi64 m(n, vi64(n));
  int x = 0, y = 0, d = 0;
  for (int i = 1; i <= n * n; i++) {
    m[y][x] = i;
    int xx = x + dy[d];
    int yy = y + dy[d];
    if (!(0 <= xx && xx < n && 0 <= yy && yy < n) || m[yy][xx] != 0) {
      d++;
      d %= 4;
      xx = x + dx[d];
      yy = y + dy[d];
    }
    x = xx;
    y = yy;
  }
  rep(y,n) {
    rep(x,n) {
      if (x + 1 < n) printf("%03d", m[y][x]);
      else printf("%03d\n", m[y][x]);
    }
  }
  return;
}

int main() {
  cin.tie(nullptr);
  ios_base::sync_with_stdio(false);
  run();
  return 0;
}