#include <bits/stdc++.h>
using namespace std;

using int64 = long long;
using uint64 = unsigned long long;

constexpr int64 MOD = 1e9 + 7;
constexpr int64 INV2 = 500000004;

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

    int N;
    cin >> N;

    int64 ans = 1, num = 2 * N;
    for (int i = 0; i < N; i++)
    {
        (ans *= (((num * (num + MOD - 1)) % MOD) * INV2) % MOD) %= MOD;
        num -= 2;
    }
    cout << ans << endl;

    return 0;
}