#include <iostream>

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, left = j, down = n - i + 1, right = n - j + 1;
                int x = min(min(up, left), min(down, right));

                cout << x << " ";
            }
            cout << endl;
        }
        cout << endl;

    }




    return 0;
}