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

int main()
{
	auto pow_mod = [](int64_t a, int64_t n, int64_t mod) {
		int64_t r = 1;
		for (; n; n >>= 1)
		{
			if (n & 1)
			{
				(r *= a) %= mod;
			}
			(a *= a) %= mod;
		}
		return r;
	};
	int64_t n, mod = 1000000007;
	cin >> n;
	vector<int64_t> fact(2 * n + 1);
	fact[0] = 1;
	for (int64_t i = 0; i < 2 * n; i++)
	{
		fact[i + 1] = fact[i] * (i + 1) % mod;
	}
	vector<int64_t> fact_rev(2 * n + 1);
	fact_rev[2 * n] = pow_mod(fact[2 * n], mod - 2, mod);
	for (int64_t i = 2 * n; i; i--)
	{
		fact_rev[i - 1] = fact_rev[i] * i % mod;
	}
	int64_t ans = 1;
	for (int64_t i = 4; i <= 2 * n; i += 2)
	{
		(ans *= fact[i] * fact_rev[2] % mod * fact_rev[i - 2] % mod) %= mod;
	}
	cout << ans << endl;
	return 0;
}