#include <iostream>
using namespace std;

int dp[100003][3][3];

int main() {
	int n;
	cin >> n;
	dp[1][1][0] = 1;
	
	for (int i = 2; i <= n; i++){
		for (int j = 0; j < 3; j++){
			for (int k = 0; k < 3; k++){
				if (dp[i - 1][j][k] != 0){
					if (j == 1 && k == 1){
						dp[i][2][j] += dp[i - 1][j][k];
						dp[i][2][j] %= 1000000007;
					}else{
						if (j == 2){
							dp[i][1][j] += dp[i - 1][j][k];
							dp[i][1][j] %= 1000000007;
						}else{
							for (int l = 1; l < 3; l++){
								dp[i][l][j] += dp[i - 1][j][k];
								dp[i][l][j] %= 1000000007;
							}
						}
					}
				}
			}
		}
	}
	
	int ans = 0;
	
	for (int i = 1; i < 3; i++){
		for (int j = 1; j < 3; j++){
			ans += dp[n][i][j];
			ans %= 1000000007;
		}
	}
	
	cout << ans << endl;
	return 0;
}