#include <bits/stdc++.h>

using namespace std;

void solve() {
    int n;
    cin >> n;
    long long ans = 2 * (long long) n * (n + 1) / 2;
    cout << ans << endl;
}

int main() {
    int tt;
    cin >> tt;
    while (tt--) {
        solve();
    }
}