#include<iostream>
#include<cstdio>
using namespace std;
int main(){
    int x;
    while(cin>>x,x){
        for(int i=1;i<=x;i++){
            for(int j=1;j<=x;j++){
                int up = i,down=x-i+1,left=j,right=x-j+1;
                cout<<min(min(up,down),min(left,right))<<" ";
            }
            cout<<endl;
        }
        cout<<endl;
    }

    return 0;
}

输出的每个位置的值是其离上下左右四个遍最近的数值