#include <bits/stdc++.h>
using namespace std;
#ifdef LOCAL
  #include "settings/debug.cpp"
#else
  #define Debug(...) void(0)
#endif
#define rep(i, n) for (int i = 0; i < (n); ++i)
using ll = long long;
using ull = unsigned long long;

int main() {
  int n;
  cin >> n;
  vector a(n, vector<int>(n));
  vector<int> dx = { 0, 1, 0, -1 };
  vector<int> dy = { 1, 0, -1, 0 };
  int x = 0, y = 0, d = 0;
  rep(_, n * n) {
    a[x][y] = _ + 1;
    int nx = x + dx[d];
    int ny = y + dy[d];
    if (nx < 0 || nx >= n || ny < 0 || ny >= n || a[nx][ny]) {
      d = (d + 1) % 4;
      nx = x + dx[d];
      ny = y + dy[d];
    }
    x = nx, y = ny;
  }
  rep(i, n) rep(j, n) {
    printf("%03d%c", a[i][j], j == n - 1 ? '\n' : ' ');
  }
  return 0;
}