#include<iostream>
using namespace std;
int main(){
    int n,a;
    cin>>n;
    while(n){
        for(int i=0;i<n;i++){
            for(int j=0;j<n;j++){
                a = min(min(min(i,j),n-i-1),n-j-1);
                printf("%d ",a+1);
            }
            printf("\n");
        }
        printf("\n");
        cin>>n;
    }
    return 0;
}