#include<bits/stdc++.h>
using namespace std;
#define rep(i,n)for(int i=0;i<(n);i++)
#define rep2(i,a,n)for(int i=(a);i<(n);i++)

void next(const int n,int &x,int &y,int &d,const int dx[],const int dy[],vector<vector<int>>& ans){
  int xx = x + dx[d];
  int yy = y + dy[d];
  if (xx < 0 || n <= xx) {
    d = (d + 1) % 4;
    xx = x + dx[d];
    yy = y + dy[d];
  } else if (yy < 0 || n <= yy) {
    d = (d + 1) % 4;
    xx = x + dx[d];
    yy = y + dy[d];
  } else if (ans[yy][xx] != 0) {
    d = (d + 1) % 4;
    xx = x + dx[d];
    yy = y + dy[d];
  }
  x = xx;
  y = yy;
}

int main() {
  cin.tie(nullptr);ios_base::sync_with_stdio(false);
  int n;
  cin>>n;
  vector<vector<int>> ans(n,vector<int>(n,0));
  int x = 0, y = 0, d = 1,idx = 1;
  const int dx[4] = { 0, 1, 0, -1 },dy[4] = { -1, 0, 1, 0 };
  rep(i,n*n){
    ans[y][x] = idx;
    next(n,x,y,d,dx,dy,ans);
    idx++;
  }

  rep(yy,n){
    rep(xx,n){
      cout<<setfill('0')<<setw(3)<<ans[yy][xx]<<" ";
    }
    cout<<endl;
  }
}