#include <bits/stdc++.h>
#define rep(i, n) for (int i = 0; i < (n); i++)
#define repi(i, a, b) for (int i = (a); i < (b); i++)
#define all(a) (a).begin(), (a).end()

using namespace std;
using i32 = int;
using i64 = long long;
using f64 = double;
using vi32 = vector<i32>;
using vvi32 = vector<vi32>;
using vi64 = vector<i64>;
using vvi64 = vector<vi64>;

template<typename T> inline bool amin(T &x, T y) { if (y < x) { x = y; return true; } return false; }
template<typename T> inline bool amax(T &x, T y) { if (x < y) { x = y; return true; } return false; }

template<int mod> class modint {
public:
  int x;
  modint(): x(0) {}
  modint(int a) { x = a % mod; if (x < 0) x += mod; }
  modint &operator+=(modint that) { x = (x + that.x) % mod; return *this; }
  modint &operator-=(modint that) { x = (x + mod - that.x) % mod; return *this; }
  modint &operator*=(modint that) { x = (long long) x * that.x % mod; return *this; }
  modint &operator/=(modint that) { return *this *= that.inverse(); }
  modint operator-() { return modint(-this->x); }
  friend ostream& operator<<(ostream &out, modint m) { return out << m.x; }
  modint inverse() {
    int a = x, b = mod, u = 1, v = 0;
    while (b) { int t = a / b; a -= t * b; u -= t * v; swap(a, b); swap(u, v); }
    return modint(u);
  }
#define op(o, p) modint operator o(modint that) { return modint(*this) p that; }
  op(+, +=) op(-, -=) op(*, *=) op(/, /=)
#undef op
#define op(o) bool operator o(modint that) { return x o that.x; }
  op(==) op(!=) op(<) op(<=) op(>) op(>=)
#undef op
};

using mint = modint<1000000007>;

int main() {
  ios::sync_with_stdio(false);
  cin.tie(0);
  int n;
  cin >> n;
  mint w[] = {1, 1, 1, 1, 1, 1, 1, 1, 1, 1};
  mint ans;
  while (n) {
    ans = 0;
    for (int i = 0; i < 10; i++) {
      ans += w[i];
      if (i > 0) {
        w[i] += w[i - 1];
      }
    }
    n--;
  }
  cout << ans << endl;
  return 0;
}