#include<iostream>
using namespace std;

int a[20][20];

int fill(int n,int ii)
{
	for(int i=n+1-ii;i<=ii;++i)
		a[n+1-ii][i]=ii;
	for(int i=n+1-ii;i<=ii-1;++i)
	{
		a[i][n+1-ii]=ii;
		a[i][ii]=ii;
	}
	for(int i=n+1-ii;i<=ii;++i)
		a[ii][i]=ii;
}

int main()
{
	int n;
	cin>>n;
	for(int i=n;i>=(n+1)/2;--i)
		fill(n,i);
	for(int i=1;i<=n;++i)
	{
		for(int j=1;j<=n;++j)
			cout<<a[i][j]<<" ";
		cout<<endl;
	}
	return 0;
}