#include<iostream>

using namespace std;

int main()
{
    int n;

    while(cin >> n,n)       //输入n，当n为0时停止输入
    {
        for(int i = 0;i < n;i ++)
        {
            for(int j = 0;j < n;j ++)
            {
                int up = i + 1, down = n - i, left = j + 1, right = n - j ;
                cout << min(min(up, down),min(left, right)) << ' ';
            }
            cout << endl;
    }
    cout << endl;
    }    
    return 0;
}