#include <algorithm>
#include <cstdlib>
#include <iostream>
#include <vector>
#include <math.h>
using namespace std;
#define int long long
int MOD = 1000000007;
int pow5(int n) {
	
	if (n == 0) {
		return 1;
	}
	int res = pow5(n / 2);
	res= (res*res) % MOD;
	if (n % 2 == 1) {
		res = (res * 5) % MOD;
	}
	return res;
}
signed main() {
	int N;
	cin >> N;
	int res = 4;
	if (N == 1) {
		res = 2;
	}
	else {	
		res = (res * pow5((N / 2) - 1)) % MOD;
		
		if (N % 2 == 1) {
			res = (res * 3) % MOD;
		}
	}
	cout << res << endl;
	return 0;
}