#include <iostream>
using namespace std;

int64_t pow_mod(int64_t a, int64_t n, int64_t m){
	int64_t r = 1;
	while(n){
		if(n & 1) (r *= a) %= m;
		(a *= a) %= m;
		n >>= 1;
	}
	return r;
}

int main(){
	int64_t n;
	cin >> n;
	if(n == 1){
		cout << 2 << endl;
		return 0;
	}
	cout << 4 * pow_mod(5, n / 2 - 1, int64_t(1e9 + 7)) * (n % 2 ? 3 : 1) % int64_t(1e9 + 7) << endl;
}