#include <bits/stdc++.h>

using namespace std;

struct Initializer {
  Initializer() {
    cin.tie(0);
    ios::sync_with_stdio(0);
    cout << fixed << setprecision(15);
  }
} initializer;

int main() {
  constexpr int dx[]{1, 0, -1, 0};
  constexpr int dy[]{0, 1, 0, -1};
  int n, x = 0, y = 0, d = 0;
  cin >> n;
  vector<vector<int>> res(n, vector<int>(n));
  for (int i = 1; i <= n * n; ++i) {
    res[y][x] = i;
    x += dx[d];
    y += dy[d];
    if (x + dx[d] < 0 || n <= x + dx[d] || y + dy[d] < 0 || n <= y + dy[d] || res[y + dy[d]][x + dx[d]]) {
      d = (d + 1) % 4;
    }
  }
  for (const auto& r : res) {
    for (int i = 0; i < n; ++i) {
      cout << setw(3) << setfill('0') << r[i] << (i < n - 1 ? " " : "\n");
    }
  }
}