#include <bits/stdc++.h>
using namespace std;

void solve() {
    int N; cin >> N;
    cout << 1LL * N * (N + 1) << '\n';
}

int main() {
    ios::sync_with_stdio(0); cin.tie(0);
    int T; cin >> T;
    for (int _ = 0; _ < T; ++_) {
        solve();
    }
}