#include "bits/stdc++.h"
//totiho

using namespace std;
#define ll long long
#define endl '\n'
#define rep(i, n) for(int i = 0; i < (int)(n); i++)
#define rep2(i,a,b) for(int i=int(a);i<int(b);i++)
#define pb push_back
#define all(x) (x).begin(),(x).end()
int mod=1e9+7;
int mod2=998244353;
const int INF=1e9;

signed main(){
    ll n;
    cin>>n;
    if(n==3){
        cout<<61<<endl;
        return 0;
    }
    if(n==4){
        cout<<230<<endl;
        return 0;
    }
    ll dp[4][4][4][n+1];
    rep(i,4)rep(j,4)rep(k,4)rep(l,n+1)dp[i][j][k][l]=0;
    rep(i,4)rep(j,4)rep(k,4){
        if(i==0&&j==1&&k==2)continue;
        if(i==1&&j==0&&k==2)continue;
        if(i==0&&j==2&&k==1)continue;
        dp[i][j][k][3]=1;
    }

    rep2(i,3,n){
        rep(j,4){
            rep(k,4){
                rep(l,4){
                    rep(c,4){
                        if(k==0&&l==1&&c==2)continue;
                        if(k==1&&l==0&&c==2)continue;
                        if(k==0&&l==2&&c==1)continue;
                        if(j==0&&k==1&&c==2)continue;
                        if(j==0&&l==1&&c==2)continue;
                        dp[k][l][c][i+1]+=dp[j][k][l][i];
                        dp[k][l][c][i+1]%=mod;
                    }
                }
            }
        }
    }
    ll ans=0;
    rep(i,4)rep(j,4)rep(k,4){
        ans+=dp[i][j][k][n];
        ans%=mod;
    }
    cout<<ans<<endl;
}

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