#include <bits/stdc++.h>
using namespace std;
template <typename T>
T gcd(T a, T b) {
  if (a == 0) return b;
  return gcd(b % a, a);
}
template <typename T>
T pow(T a, T b, long long m) {
  T ans = 1;
  while (b > 0) {
    if (b % 2 == 1) ans = (ans * a) % m;
    b /= 2;
    a = (a * a) % m;
  }
  return ans % m;
}
int main() {
  ios::sync_with_stdio(0);
  cin.tie(0);
  cout.tie(0);
  ;
  long long n;
  cin >> n;
  long long b = pow(4LL, n, (long long)1000000007);
  long long a = pow(2LL, n, (long long)1000000007);
  a -= 1;
  if (a < 0) a += 1000000007;
  a %= 1000000007;
  long long c = pow(2LL, (n - 1), (long long)1000000007);
  c %= 1000000007;
  long long d = (a * c);
  d %= 1000000007;
  long long e = b - d;
  if (e < 0) e += 1000000007;
  cout << e;
}
