#include <bits/stdc++.h>
#define ll long long
#define INF 1000000005
#define MOD 1000000007
#define EPS 1e-10
#define rep(i,n) for(int i=0;i<(int)n;++i)
#define each(a, b) for(auto (a): (b))
#define all(v) (v).begin(),(v).end()
#define fi first
#define se second
#define pb push_back
#define show(x) cout <<#x<<" = "<<(x)<<endl
#define spair(p) cout <<#p<<": "<<p.fi<<" "<<p.se<<endl
#define svec(v) cout<<#v<<":";rep(kbrni,v.size())cout<<" "<<v[kbrni];cout<<endl
#define sset(s) cout<<#s<<":";each(kbrni,s)cout <<" "<<kbrni;cout<<endl

using namespace std;

typedef pair<int,int>P;

const int MAX_N = 100005;

void extgcd(int a,int b, int& x,int& y)
{
	if(b != 0){
		extgcd(b,a%b,y,x);
		y -= (a/b)*x;
	}else{
		x = 1;
		y = 0;
	}
}

int mod_inverse(int a,int m)
{
	int x,y;
	extgcd(a,m,x,y);
	return (m + x % m) % m;
}


int main()
{
    int n;
    cin >> n;
    ll res = 1;
    for(int i=1;i<=2*n;i++){
        res = res * i % MOD;
    }
    ll res2 = 1;
    ll val = 2;
    while(n){
        if(n & 1){
            res2 = res2 * val % MOD;
        }
        val = val * val % MOD;
        n >>= 1;
    }
    ll res3 = mod_inverse(res2,MOD);
    cout << res * res3 % MOD << "\n";
    return 0;
}