#include <bits/stdc++.h>
using namespace std;

#define _p(...) (void)printf(__VA_ARGS__)
#define forr(x,arr) for(auto&& x:arr)
#define _overload3(_1,_2,_3,name,...) name
#define _rep2(i,n) _rep3(i,0,n)
#define _rep3(i,a,b) for(int i=int(a);i<int(b);++i)
#define rep(...) _overload3(__VA_ARGS__,_rep3,_rep2,)(__VA_ARGS__)
#define _rrep2(i,n) _rrep3(i,0,n)
#define _rrep3(i,a,b) for(int i=int(b)-1;i>=int(a);i--)
#define rrep(...) _overload3(__VA_ARGS__,_rrep3,_rrep2,)(__VA_ARGS__)
#define ALL(x) (x).begin(), (x).end()
#define BIT(n) (1LL<<(n))
#define SZ(x) ((int)(x).size())
#define fst first
#define snd second
typedef vector<int> vi;typedef vector<vi> vvi;typedef pair<int,int> pii;typedef vector<pii> vpii;
typedef long long ll;

int DY[4] = {0, 1, 0, -1};
int DX[4] = {1, 0, -1, 0};

template<typename T> inline bool inside(T y, T x, T h, T w) { return 0 <= y && y < h && 0 <= x && x < w; };

void Main() {
  int N;
  scanf("%d", &N);
  int y=0, x=0;
  vvi M(N, vi(N));

  int d = 0;
  rep(i, 1, N*N+1) {
    M[y][x] = i;
    int ny = y + DY[d];
    int nx = x + DX[d];

    if (!inside(ny, nx, N, N) || M[ny][nx] != 0) {
      d++;
      d %= 4;
      ny = y + DY[d];
      nx = x + DX[d];
    }
    //_p("%d:(%d,%d)\n",i,y,x);
    y = ny;
    x = nx;
  }

  rep(y,N) {
    rep(x, N) {
      _p(x+1<N?"%03d ":"%03d\n", M[y][x]);
    }
  }
}
int main() { cin.tie(0); ios::sync_with_stdio(false); Main(); return 0; }