#include <bits/stdc++.h>

using namespace std;

const std::vector<int> dx = {1, 0, -1, 0}, dy = {0, 1, 0, -1};

int main() {
  ios::sync_with_stdio(false);
  cin.tie(nullptr);
  int N;
  cin >> N;
  vector<vector<int>> res(N, vector<int>(N, 0));
  int cur = 0;
  int y = 0, x = 0;
  for (int i = 0; i < N * N; i++) {
    res[y][x] = i + 1;
    int ny = y + dy[cur], nx = x + dx[cur];
    if (ny < 0 || ny >= N || nx < 0 || nx >= N || res[ny][nx] != 0) {
      cur = (cur + 1) % 4;
      ny = y + dy[cur], nx = x + dx[cur];
    }
    y = ny, x = nx;
  }
  for (int i = 0; i < N; i++) {
    for (int j = 0; j < N; j++) {
      cout << setfill('0') << right << setw(3) << res[i][j] << (j == N - 1 ? '\n' : ' ');
    }
  }
  return 0;
}