#include <iostream>
#include <iomanip>
#include <vector>

template <class T>
std::vector<T> vec(int len, T elem) { return std::vector<T>(len, elem); }

const std::vector<int> dx{0, 1, 0, -1}, dy{1, 0, -1, 0};

void solve() {
    int n;
    std::cin >> n;

    auto ans = vec(n, vec(n, -1));
    int i = 0, x = 0, y = 0, id = 1;
    ans[x][y] = id++;

    while (true) {
        bool update = false;

        while (true) {
            int nx = x + dx[i],
                ny = y + dy[i];

            if (nx < 0 || n <= nx ||
                ny < 0 || n <= ny ||
                ans[nx][ny] != -1) break;

            ans[nx][ny] = id++;
            x = nx, y = ny;
            update = true;
        }

        if (!update) break;

        (++i) %= 4;
    }

    for (const auto& v : ans) {
        for (auto a : v) {
            std::cout << std::setw(3) << std::setfill('0') << a << " ";
        }
        std::cout << std::endl;
    }
}

int main() {
    std::cin.tie(nullptr);
    std::ios::sync_with_stdio(false);

    solve();

    return 0;
}