#define rep(i, n) for (int i = 0; i < (int)(n); i++)
#define ALL(v) v.begin(), v.end()
typedef long long ll;

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

int main(){
  int n;
  cin>>n;
  
  int A[n][n];
  rep(i,n){
    rep(j,n){
      int t=i+j;
      if(t>=n) t-=n;
      if(t%2==0) A[i][j]=t/2+1;
      else A[i][j]=(t+1)/2+(n+1)/2;
    }
  }
  
  rep(i,n){
    rep(j,n){
      if(j) cout<<" ";
      cout<<A[i][j];
    }
    cout<<endl;
  }

  return 0;
}