#include <bits/stdc++.h>
using namespace std;
template <typename T>
std::ostream &operator<<(std::ostream &out, vector<T> &v) {
  for (typename vector<T>::size_type i = 0; i < v.size(); ++i)
    out << v[i] << " ";
  out << "\n";
  return out;
}
template <typename T, typename N>
std::ostream &operator<<(std::ostream &out, vector<pair<T, N> > &v) {
  for (size_t i = 0; i < v.size(); ++i)
    out << "(" << v[i].first << ", " << v[i].second << ") ";
  out << "\n";
  return out;
}
template <typename T>
std::ostream &operator<<(std::ostream &out, vector<vector<T> > &v) {
  for (size_t i = 0; i < v.size(); ++i) {
    for (size_t j = 0; j < v[i].size(); ++j) {
      out << v[i][j] << " ";
    }
    out << "\n";
  }
  return out;
}
long long mod = 1e9 + 7;
long long fast_pow(long long a, long long b) {
  long long ans = 1;
  while (b) {
    if (b & 1) {
      ans = (ans * a) % mod;
    }
    b >>= 1;
    a = (a * a) % mod;
  }
  return ans;
}
int main() {
  std::ios::sync_with_stdio(false);
  cin.tie(0);
  cout.tie(0);
  long long n;
  cin >> n;
  if (!n) {
    cout << "1\n";
    return 0;
  }
  cout << ((fast_pow(2, n - 1) + fast_pow(2, 2 * n - 1)) % mod) << "\n";
  return 0;
}
