#include <iostream>
using namespace std;
typedef long long LL;
LL MOD=1000000007;
int main(int argc, char* argv[])
{
	LL N,i;
	cin>>N;
	LL F0=0;
	LL F1=1;
	LL F2;
	LL Sum=F1*F1;
	for (i=2;i<=N;i++){
		F2=F1+F0;
		LL F=F2*F2;
		F%=MOD;
		Sum+=F;
		Sum%=MOD;
		F0=F1;
		F0%=MOD;
		F1=F2;
		F1%=MOD;
	}
	cout<<Sum<<endl;
	return 0;
}