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

ll MOD = 1e9 + 7;

int main(void) {
    ll N;
    cin >> N;
    ll ans = 1;
    for (int i = 1; i <= 2*N; i++) {
        ans *= i % 2 == 0 ? i/2 : i;
        ans %= MOD;
    }
    cout << ans << endl;
    return 0;
}