#include<cstdio>
#include<iostream>
using namespace std;

int main(){
    int n;
    while(scanf("%d", &n), n > 0){
        for(int i = 1; i <= n; ++i){
            for(int j = 1; j <= n; ++j){
                int up = i, down = n - i + 1, right = n - j + 1, left = j;
                printf("%d ", min(min(up, down), min(right, left))); 
            }
            printf("\n");
        }
        printf("\n");
    }
    return 0;
}