#include <bits/stdc++.h>
#define rep(i,n) for(int i=0;i<n;i++)
using namespace std;
using ll =  long long ;
using P = pair<int,int> ;
const int INF = 1e9;
const int MOD = 1000000007;

int main(){
    int n;
    cin >> n;
    ll A = 1,B = 1;
    for(ll i=1;i<=2*n;i++){
        if(i <= n) A = (A * i)%MOD;
        
        if(i%2 == 0) B = (B * i/2)%MOD;
        else B = (B * i)%MOD;
    }
    cout << (A*B)%MOD << endl;
    return 0;
}