#include <bits/extc++.h>

#ifndef DUMP
#define DUMP(...) (void)0
#endif

using namespace std;

int main() {
  cin.tie(nullptr)->sync_with_stdio(false);
  int n;
  cin >> n;
  for (int i = 0; i < n; ++i) {
    for (int j = 0; j < n; ++j) {
      int k = i + j;
      if (k % 2 == 0) {
        cout << k / 2 + 1;
      } else if (k < n - 1) {
        cout << n / 2 + k / 2 + 2;
      } else {
        cout << (k - n) / 2 + 1;
      }
      cout << " \n"[j == n - 1];
    }
  }
}