#include <bits/stdc++.h>
using namespace std;

#define INF_LL (ll)1e18
#define INF (int)1e9
#define REP(i, n) for(int i = 0;i < (n);i++)
#define FOR(i, a, b) for(int i = (a);i < (b);i++)
#define all(x) x.begin(),x.end()
#define fs first
#define sc second

using int32 = int_fast32_t;
using uint32 = uint_fast32_t;
using int64 = int_fast64_t;
using uint64 = uint_fast64_t;
using PII = pair<int32, int32>;
using PLL = pair<int64, int64>;

const double eps = 1e-10;

template<typename A, typename B>inline void chmin(A &a, B b){if(a > b) a = b;}
template<typename A, typename B>inline void chmax(A &a, B b){if(a < b) a = b;}

int64 N;
int64 fact[412345] = {};
const int64 mod = 1e9+7;

int64 mpow(int64 a, int64 b){
	if(b == 0) return 1;
	if(b%2) return a*mpow(a, b-1)%mod;
	int64 ret = mpow(a, b/2);
	return ret*ret%mod;
}

int64 comb(int64 a, int64 b){
	if(a < 0 || b < 0) return 0;
	return fact[a]*mpow(fact[b], mod-2)%mod*mpow(fact[a-b], mod-2)%mod;
}

int main(void){
	cin >> N;

	fact[0] = 1;
	REP(i, 412344){
		fact[i+1] = (fact[i]*(i+1))%mod;
	}

	int64 x = N/2;
	int64 res = 0;
	int64 now = 0;

	for(int32 i = 0;i < N/2+1;i++){
		res = (res+comb(N+2*i-1, i)-comb(N+2*i-1, i-1)+mod)%mod;
	}
	cout << res << endl;

}