#include <bits/stdc++.h>
using namespace std;
int main() {
    long long n;
    cin >> n;
    __int128 m = n - 4;
    __int128 v = m + 3;
    __int128 a = (v * v + 6) / 12;
    cout << (long long)(a % 1000000007) << endl;
    return 0;
}