#include <iostream>
#include <cstdio>

using namespace std;

typedef long long LL;

const int MOD = 1000000007, I2 = 500000004, I6 = 166666668;

LL n, ans;

/**
 * $ans=\frac{1}{6}\left[\binom{n-2}{2}+3\left(\left\lfloor\frac{n-2}{2}\right\rfloor-((n-1)\bmod 3=0)\right)+5\cdot ((n-1)\bmod 3=0 \right]$
 */
int main() {
    // freopen("ygraph.in", "r", stdin);
    // freopen("ygraph.out", "w", stdout);

    scanf("%lld", &n);

    ans = (n - 2) % MOD * ((n - 3) % MOD) % MOD * I2 % MOD;
    ans = (ans + 3LL * (((n - 2) / 2 - ((n - 1) % 3 == 0)) % MOD)) % MOD;
    ans = (ans + 5LL * ((n - 1) % 3 == 0)) % MOD;
    
    printf("%lld\n", ans * I6 % MOD);

    return 0;
}