#include <bits/stdc++.h>

template<typename T> T in() { abort(); return T(); }
template<> std::string in() { std::string str; std::cin >> str; return str; }
template<> int in() { int x; scanf("%d", &x); return x; }

template<typename T> void out(T x) { abort(); }
template<> void out(std::string x) { std::cout << x << std::endl; }

int xss[32][32];
int dx[] = {1, 0, -1, 0};
int dy[] = {0, 1, 0, -1};

int main() {
  auto n = in<int>();
  int x = 0, y = 0;
  int d = 0;
  int v = 1;
  for(int i = 0; i < n * n; ++i) {
    assert( xss[y][x] == 0 );
    xss[y][x] = v; v += 1;
    for(int k = 0; k < 4; ++k) {
      int nx = x + dx[(d + k) % 4];
      int ny = y + dy[(d + k) % 4];
      if( not ( 0 <= nx and nx < n and 0 <= ny and ny < n ) ) continue;
      if( not ( xss[ny][nx] == 0 ) ) continue;
      x = nx;
      y = ny;
      d = (d + k) % 4;
      break;
    }
  }

  for(int i = 0; i < n; ++i) {
    for(int j = 0; j < n; ++j) {
      printf("%03d%c", xss[i][j], j == n - 1 ? '\n' : ' ');
    }
  }
  
  return 0;
}