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

int main() {
    int n;
    cin >> n;
    
    for (int i = 1; i <= n; ++i) {
        for (int j = 1; j <= n; ++j) {
            int top = i;
            int bottom = n - i + 1;
            int left = j;
            int right = n - j + 1;
            int min_val = min(min(top, bottom), min(left, right));
            cout << setw(3) << min_val;
        }
        cout << endl;
    }
    
    return 0;
}

/**************************************************************
	Problem: 1200
	User: fuyijun
	Language: C++
	Result: Wrong Answer
****************************************************************/