#include<fstream>
#define M 9999991
using namespace std;
ifstream in("dirichlet.in");
ofstream out("dirichlet.out");
long long r=1,q,n,k;
inline long long inv(long long a, int b){
    int p=1;
    while(b){
        if(b&1) p=((p%M)*(a%M))%M;
        a=((a%M)*(a%M))%M;
        b/=2;
    }
    return p%M;
}
int main(){
    in>>q;
    n=2*q; k=q;
    for(int i=1;i<k;++i)
        r=(((r%M)*((n-i+1)%M))%M * inv(i,M-2)%M)%M;
    r=((r%M)*inv(k,M-2)%M)%M;
    out<<r<<'\n';
    return 0;
}