#include <bits/stdc++.h>
#include <atcoder/all>
using namespace std;
using namespace atcoder;
using ll = long long;
using ld = long double;

int n, now = 0, x = 0, y = 0;
string grid[33][33];
int dx[] = {1, 0, -1, 0};
int dy[] = {0, 1, 0, -1};

int main() {
  cin >> n;
  for (int i = 1; i <= n * n; i++) {
    char s[20];
    sprintf(s, "%03d", i);
    grid[y][x] = s;
    int nx = x + dx[now];
    int ny = y + dy[now];
    if (0 > nx || nx >= n || 0 > ny || ny >= n || grid[ny][nx] != "") {
      now = (now + 1) % 4;
    }
    x += dx[now];
    y += dy[now];
  }
  for (int i = 0; i < n; i++) {
    for (int j = 0; j < n; j++) cout << grid[i][j] << " \n"[j == n - 1];
  }
  return 0;
}