#include <bits/stdc++.h>
#define ull long long
#define MOD 1000000007
using namespace std;

ull inverseMult(ull a, ull b, ull s0 = 1, ull s1 = 0) {
    return (b == 0) ? s0 : inverseMult(b, a % b, s1, s0 - (s1*(a/b)));
}
ull binomialCoeff(ull n, ull k) {
    ull res = 1;
    k = (k > n - k) ? n - k : k;
    for(ull i = 0; i < k; i++) {
        res = ((res%MOD) * ((n-i)%MOD)) % MOD;
        res += (res < 0) ? MOD : 0;
        ull temp = inverseMult(i + 1, MOD);
        temp += (temp < 0) ? MOD : 0;
        res = (res % MOD * temp % MOD) % MOD;
    }
    return res;
}
ull solve(ull n) {
    ull c = binomialCoeff(2 * n, n) - binomialCoeff(2 * n, n + 1);
    ull temp = inverseMult(n + 1, MOD);
    temp += (temp < 0) ? MOD : 0;
    return ((c % MOD) * (temp % MOD)) % MOD;
}
int main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);

    ull n;
    cin >> n;
    cout << solve(n) % MOD;
}