#include <bits/stdc++.h>
#include<atcoder/all>
using namespace atcoder;
using namespace std;
using ll=long long;
using ld=long double;
ld pie=3.141592653589793;
ll mod=1000000007;
ll inf=30000000000000000;//10^17
int main(){
    ll n;
    cin >> n;
    vector<vector<ll>>dp(n,vector<ll>(5,0));
    dp[0][0]=1;
    dp[0][1]=1;
    for (ll i = 1; i < n; i++)
    {
        dp[i][0]+=dp[i-1][0];
        dp[i][0]+=dp[i-1][2];
        dp[i][1]+=dp[i-1][0];
        dp[i][1]+=dp[i-1][1];
        dp[i][1]+=dp[i-1][3];
        dp[i][2]+=dp[i-1][1];
        dp[i][3]+=dp[i-1][2];
        dp[i][4]+=dp[i-1][3];
        dp[i][4]+=dp[i-1][4]*2;
        for (ll j = 0; j <=4; j++)
        {
            dp[i][j]%=mod;
        }
    }
    cout << dp[n-1][4] << endl;
}