#include <iostream>
#include <string>
#include <algorithm>
#include <vector>
#include <iomanip>
#include <cmath>
#include <stdio.h>
#include <queue>
#include <deque>
#include <cstdio>
#include <set>
#include <map>
#include <bitset>
#include <stack>
#include <cctype>
using namespace std;
long long mod = 1000000007;
int main() {
	long long n;
	cin >> n;
	n -= 4;
	long long ans = 6 * (n / 6 % mod) % mod * ((n / 6 + 1) % mod) / 2 % mod + (n % 6) * ((n / 6 + 1) % mod) % mod;
	if (n % 6 == 0)ans++;
	cout << (ans + mod) % mod << endl;
	return 0;
}