#include <iostream>
#define int long long
using namespace std;

int powmod(int a, int n, int mod) {
	if (n == 0) return 1;
	if (n % 2 == 0) return powmod((a * a) % mod, n / 2, mod);
	return (a * powmod(a, n - 1, mod)) % mod;
}

signed main() {
	int n, mod = 1000000007;
	cin >> n;
	if (n == 1) cout << 2 << endl;
	else cout << (4 * powmod(5, (n - 2) / 2, mod) * powmod(3, n % 2, mod)) % mod << endl;
	return 0;
}