#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
ll mod=1000000007;
int main(){
    ll n;cin>>n;
    if(n==1){
        cout<<2<<endl;
        return 0;
    }
    ll ans=1;
    for(ll i=0;i<n/2;i++){
        if(i==0)ans*=4;
        else ans*=5;
        ans%=mod;
    }
    if(n%2==1)ans*=3;
    ans%=mod;
    cout<<ans<<endl;
}