#include<bits/stdc++.h>
using namespace std;
#define FOR(i,a,b) for (int i=(a);i<(b);i++)
#define RFOR(i,a,b) for (int i=(b)-1;i>=(a);i--)
#define REP(i,n) for (int i=0;i<(n);i++)
#define RREP(i,n) for (int i=(n)-1;i>=0;i--)
typedef long long LL;
LL N;
int main(){
    LL ans=1;
    cin>>N;
    REP(i,2*N){
        LL a=i+1;
        if(a%2==0)a/=2;
        ans*=a;
        LL MOD=1e9+7;
        ans=ans%MOD;
    }
    cout<<ans<<endl;
    return(0);
}