#include <bits/stdc++.h>
using namespace std;
int main() {
  ios_base::sync_with_stdio(0);
  cin.tie(0);
  cout.tie(0);
  ;
  long long n, h;
  cin >> n;
  h = n / 2 + 1;
  long long odd = 0, even = 0;
  for (long long i = 1; i <= n; i++) {
    for (long long j = 1; j <= n; j++) {
      if ((abs(i - h) + abs(j - h)) >= h) {
        cout << even * 2 + 2 << " ";
        even++;
      } else {
        cout << odd * 2 + 1 << " ";
        odd++;
      }
    }
    cout << endl;
  }
}
