#include<iostream>
using namespace std;

int mod = 1e9 + 7;

long long int factorial_power(int n)
{
	long long int ans = 1;
	for (int i = 2; i <= 2*n; i++)
	{
		ans *= i;
		if (i % 2 == 0) ans /= 2;
		ans %= mod;
	}
	return ans;
}

int main()
{
	int n;

	cin >> n;

	cout << factorial_power(n) << endl;
}