#include <bits/stdc++.h>

#include <atcoder/modint>
using namespace std;
using mint = atcoder::modint1000000007;

void fast_io() {
    ios::sync_with_stdio(false);
    std::cin.tie(nullptr);
}

int main() {
    fast_io();
    int n;
    cin >> n;
    vector<vector<mint>> dp(n + 1, vector<mint>(16, 0));
    dp[0][0] = 1;
    for (int i = 0; i < n; i++) {
        for (int j = 0; j < 16; j++) {
            dp[i + 1][2 * j % 16] += dp[i][j];
            dp[i + 1][(2 * j + 1) % 16] += dp[i][j];
        }
        dp[i + 1][10] = 0;
    }
    mint ans = mint(2).pow(n);
    for (int j = 0; j < 16; j++) {
        ans -= dp[n][j];
    }
    cout << ans.val() << endl;
}