#include<cstdio>
#include<iostream>
#include<cmath>
using namespace std;
int main()
{
    int n=0;
    while(cin>>n,n)
    {
        for(int i=1;i<=n;i++)
        {
            for(int j=1;j<=n;j++)
            {
                int a=i,b=j,c=n-i+1,d=n-j+1;
                cout<<min(min(a,b),min(c,d))<<' ';
            }
            cout<<endl;
        }
        cout<<endl;
    }

    return 0;
}