#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 min_val = min(i, n - i + 1);
            min_val = min(min_val, j);
            min_val = min(min_val, n - j + 1);
            cout << setw(3) << min_val;
        }
        cout << endl;
    }
    
    return 0;
}

/**************************************************************
	Problem: 1198
	User: fuyijun
	Language: C++
	Result: Wrong Answer
****************************************************************/