#include "bits/stdc++.h"

#pragma warning(disable : 4996)

typedef long long ll;
#define all(x) (x).begin(), (x).end() // sortなどの引数を省略
#define rep(i, n) for (ll i = 0; i < (ll)(n); i++)
#define max3(x, y, z) max(x, max(y, z))
#define min3(x, y, z) min(x, min(y, z))

#ifdef _MSC_FULL_VER // デバッグ出力
#define dout cout
#define debug() if (true)
#define check(x) std::cout << "★" << #x << "の値:" << (x) << endl
#define pass(x) std::cout << "☆" << x << endl
#else
#define dout \
  if (false) \
  cout
#define debug() if (false)
#define check(x) \
  if (false)     \
  cout << "★" << #x << "の値:" << (x) << endl
#define pass(x) \
  if (false)    \
  cout << "☆" << x << endl
#endif

using namespace std;
// #define int long long;

double dist(double x1, double y1, double x2, double y2)
{
  return sqrt((x1 - x2) * (x1 - x2) + (y1 - y2) * (y1 - y2));
}
ll idist(ll x1, ll y1, ll x2, ll y2)
{
  return (x1 - x2) * (x1 - x2) + (y1 - y2) * (y1 - y2);
}

signed main()
{
  ll n;
  cin >> n;
  ll x = 0,y = 0;
  ll dir = 0;
  vector<vector<ll>> vv(n,vector<ll>(n,-1));
  rep(i,n*n){
    vv[x][y] = i+1;
    if(dir == 0){
      x++;
      if(x == n-1 || vv[x+1][y] != -1){
        dir = 1;
      }
    }
    else if(dir == 1){
      y++;
      if(y == n-1 || vv[x][y+1] != -1){
        dir = 2;
      }
    }
    else if(dir == 2){
      x--;
      if(x == 0 || vv[x-1][y] != -1){
        dir = 3;
      }
    }
    else if(dir == 3){
      y--;
      if(y == 0  || vv[x][y-1] != -1){
        dir = 0;
      }
    }

  }
  rep(i,n){
    rep(j,n){
      if(vv[j][i] < 10) cout << "00" << vv[j][i] << " ";
      else if(vv[j][i] < 100) cout << 0 << vv[j][i] << " ";
      else cout << vv[j][i] << " ";
    }
    cout << endl;
  }
}