#include <bits/stdc++.h>

//!===========================================================!//
//!  dP     dP                          dP                    !//
//!  88     88                          88                    !//
//!  88aaaaa88a .d8888b. .d8888b. .d888b88 .d8888b. 88d888b.  !//
//!  88     88  88ooood8 88'  `88 88'  `88 88ooood8 88'  `88  !//
//!  88     88  88.  ... 88.  .88 88.  .88 88.  ... 88        !//
//!  dP     dP  `88888P' `88888P8 `88888P8 `88888P' dP        !//
//!===========================================================!//
using ld = long double;
using ll = long long;
std::mt19937 mt{std::random_device{}()};
template <typename F>
constexpr F PI() { return 3.1415926535897932385; }
template <typename T, std::size_t N>
std::ostream& operator<<(std::ostream& os, const std::array<T, N>& v)
{
    os << "[";
    for (const auto& e : v) { os << e << ","; }
    return (os << "]" << std::endl);
}
template <typename T, typename A>
std::ostream& operator<<(std::ostream& os, const std::deque<T, A>& v)
{
    os << "[";
    for (const auto& e : v) { os << e << ","; }
    return (os << "]" << std::endl);
}
template <typename K, typename T, typename C, typename A>
std::ostream& operator<<(std::ostream& os, const std::multimap<K, T, C, A>& v)
{
    os << "[";
    for (const auto& e : v) { os << "<" << e.first << ": " << e.second << ">,"; }
    return (os << "]" << std::endl);
}
template <typename T, typename C, typename A>
std::ostream& operator<<(std::ostream& os, const std::multiset<T, C, A>& v)
{
    os << "[";
    for (const auto& e : v) { os << e << ","; }
    return (os << "]" << std::endl);
}
template <typename K, typename T, typename C, typename A>
std::ostream& operator<<(std::ostream& os, const std::map<K, T, C, A>& v)
{
    os << "[";
    for (const auto& e : v) { os << "<" << e.first << ": " << e.second << ">,"; }
    return (os << "]" << std::endl);
}
template <typename T1, typename T2>
std::ostream& operator<<(std::ostream& os, const std::pair<T1, T2>& v) { return (os << "<" << v.first << "," << v.second << ">"); }
template <typename T1, typename T2, typename T3>
std::ostream& operator<<(std::ostream& os, const std::priority_queue<T1, T2, T3>& v)
{
    auto q = v;
    os << "[";
    while (not q.empty()) { os << q.top() << ",", q.pop(); }
    return os << "]\n";
}
template <typename T1, typename T2>
std::ostream& operator<<(std::ostream& os, const std::queue<T1>& v)
{
    auto q = v;
    os << "[";
    while (not q.empty()) { os << q.front() << ",", q.pop(); }
    return os << "]\n";
}
template <typename T, typename C, typename A>
std::ostream& operator<<(std::ostream& os, const std::set<T, C, A>& v)
{
    os << "[";
    for (const auto& e : v) { os << e << ","; }
    return (os << "]" << std::endl);
}
template <typename T1, typename T2>
std::ostream& operator<<(std::ostream& os, const std::stack<T1>& v)
{
    auto q = v;
    os << "[";
    while (not q.empty()) { os << q.top() << ",", q.pop(); }
    return os << "]\n";
}
template <typename K, typename T, typename H, typename P, typename A>
std::ostream& operator<<(std::ostream& os, const std::unordered_multimap<K, T, H, P, A>& v)
{
    os << "[";
    for (const auto& e : v) { os << "<" << e.first << ": " << e.second << ">,"; }
    return (os << "]" << std::endl);
}
template <typename T, typename H, typename P, typename A>
std::ostream& operator<<(std::ostream& os, const std::unordered_multiset<T, H, P, A>& v)
{
    os << "[";
    for (const auto& e : v) { os << e << ","; }
    return (os << "]" << std::endl);
}
template <typename K, typename T, typename H, typename P, typename A>
std::ostream& operator<<(std::ostream& os, const std::unordered_map<K, T, H, P, A>& v)
{
    os << "[";
    for (const auto& e : v) { os << "<" << e.first << ": " << e.second << ">,"; }
    return (os << "]" << std::endl);
}
template <typename T, typename H, typename P, typename A>
std::ostream& operator<<(std::ostream& os, const std::unordered_set<T, H, P, A>& v)
{
    os << "[";
    for (const auto& e : v) { os << e << ","; }
    return (os << "]" << std::endl);
}
template <typename T, typename A>
std::ostream& operator<<(std::ostream& os, const std::vector<T, A>& v)
{
    os << "[";
    for (const auto& e : v) { os << e << ","; }
    return (os << "]" << std::endl);
}
#define show(x) std::cerr << #x << " = " << (x) << std::endl
//!===============================================================================!//
//!  8888ba.88ba                 dP     a88888b.                     dP       oo  !//
//!  88  `8b  `8b                88    d8'   `88                     88           !//
//!  88   88   88 .d8888b. .d888b88    88        .d8888b. 88d8b.d8b. 88d888b. dP  !//
//!  88   88   88 88'  `88 88'  `88    88        88'  `88 88'`88'`88 88'  `88 88  !//
//!  88   88   88 88.  .88 88.  .88    Y8.   .88 88.  .88 88  88  88 88.  .88 88  !//
//!  dP   dP   dP `88888P' `88888P8     Y88888P' `88888P' dP  dP  dP 88Y8888' dP  !//
//!===============================================================================!//
template <ll mod>
class ModComb
{
public:
    ModComb(const std::size_t n) : in(n + 1, 1), f(n + 1, 1), invf(n + 1, 1)
    {
        for (ll i = 2; i <= (ll)n; i++) { f[i] = (f[i - 1] * i) % mod, in[i] = ((mod - (mod / i)) * in[mod % i]) % mod, invf[i] = (invf[i - 1] * in[i]) % mod; }
    }
    ll fact(const std::size_t n) const { return f[n]; }
    ll inv(const std::size_t n) const { return in[n]; }
    ll invFact(const std::size_t n) const { return invf[n]; }
    ll perm(const std::size_t n, const std::size_t k) const { return f[n] * invf[n - k] % mod; }
    ll comb(const std::size_t n, const std::size_t k) const { return (f[n] * invf[k] % mod) * invf[n - k] % mod; }

private:
    std::vector<ll> in, f, invf;
};
//!============================================!//
//!    8888ba.88ba             oo              !//
//!    88  `8b  `8b                            !//
//!    88   88   88  .d8888b.  dP  88d888b.    !//
//!    88   88   88  88'  `88  88  88'  `88    !//
//!    88   88   88  88.  .88  88  88    88    !//
//!    dP   dP   dP  `88888P8  dP  dP    dP    !//
//!============================================!//
int main()
{
    int N;
    std::cin >> N;
    constexpr ll MOD = 1000000007LL;
    ModComb<MOD> mod(2 * N);
    std::cout << (mod.fact(2 * N) * mod.invFact(N) % MOD) * mod.invFact(N + 1) % MOD << std::endl;
    return 0;
}