#include<bits/stdc++.h>
#define ALL(v) std::begin(v),std::end(v)
using lint=long long;
using lubl=long double;
struct mint{
    lint value;
    mint()=default;
    mint(lint value):value(value){}
};
lint mod=1'000'000'007;
std::ostream&operator<<(std::ostream&os,mint x){return os<<x.value;}
mint operator*(mint x,mint y){return x.value*y.value%mod;}
mint&operator*=(mint&x,mint y){return x=x*y;}
int main(){
    std::cin.tie(nullptr);std::ios_base::sync_with_stdio(false);
    std::cout.setf(std::ios_base::fixed);std::cout.precision(15);
    lint n;std::cin>>n;
    mint ans=1;
    for(lint i=1;i<=2*n;i++)ans*=i;
    mint inv2=(1+mod)/2;
    for(lint i=1;i<=n;i++)ans*=inv2;
    std::cout<<ans<<'\n';
}