#define _USE_MATH_DEFINES
#include <cstdio>
#include <iostream>
#include <sstream>
#include <fstream>
#include <iomanip>
#include <algorithm>
#include <cmath>
#include <complex>
#include <string>
#include <vector>
#include <list>
#include <queue>
#include <stack>
#include <set>
#include <map>
#include <bitset>
#include <numeric>
#include <limits>
#include <climits>
#include <cfloat>
#include <functional>
#include <iterator>
using namespace std;

const int MOD = 1000000007;

long long power(long long a, long long b)
{
    long long ret = 1;
    long long tmp = a;
    while(b > 0){
        if(b & 1){
            ret *= tmp;
            ret %= MOD;
        }
        tmp *= tmp;
        tmp %= MOD;
        b >>= 1;
    }
    return ret;
}

long long solve(long long n)
{
    if(n == 1)
        return 2;

    long long ans = power(5, n / 2 - 1) * 4 % MOD;
    if(n % 2 != 0){
        ans *= 3;
        ans %= MOD;
    }
    return ans;
}

int main()
{
    long long n;
    cin >> n;

    cout << solve(n) << endl;

    return 0;
}