#include<bits/stdc++.h>
#define int long long
using namespace std;
const int mod=1e9+7;
int a[7000101];
signed main(){
	int n;
	cin>>n;
	a[1]=1,a[2]=2;
	for(int i=3;i<=n;i++){
		a[i]=((a[i-1]%mod)*((4*(i-1)+2)%mod))%mod;
		a[i]/=(i+1);
		a[i]%=mod;
	}cout<<a[n]%mod;
}