#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;
}