#include <iostream>
#include <cmath>

using namespace std;

int main(){
    int n;

    while(cin >> n, n ){

        for (int i = 1; i <= n; i ++)
        {
            for (int j = 1; j <= n; j ++)
            {
                int up=i,down=n-i+1,left=j,right=n-j+1;
                cout<<min(min(up,down),min(left,right))<<" ";
            }
            cout << endl;
        }
        cout << endl;
    }

    return 0;
}