#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,down = n - i + 1, left = j,right = n - j + 1;
                cout << min(min(up,down),min(left,right)) << " ";
            }
            cout << endl;
        }
        cout << endl;
    }
    return 0;
}