#include <stdio.h>
#include <bits/stdc++.h>
#include <atcoder/all>
using namespace atcoder;
using mint = modint1000000007;
using namespace std;
#define rep(i,n) for(int i=0;i<(n);i++)
#define Inf 1000000001

int main(){
	
	int n;
	cin>>n;
	
	vector dp(1<<4,vector<mint>(2,0));
	dp[0][0] = 1;
	
	rep(i,n){
		vector ndp(1<<4,vector<mint>(2,0));
		rep(j,1<<4){
			rep(k,2){
				if(dp[j][k]==0)continue;
				rep(l,2){
					int jj = j,kk = k;
					jj <<= 1;
					jj &= 15;
					jj += l;
					if(jj==10)kk = 1;
					ndp[jj][kk] += dp[j][k];
				}
			}
		}
		swap(dp,ndp);
	}
	mint ans= 0;
	rep(i,dp.size())ans += dp[i][1];
	cout<<ans.val()<<endl;
	
	return 0;
}