#include <iostream>
#include <vector>
#include <atcoder/all>

#define ALL(V) std::begin(V), std::end(V)

using ll = long long;

int main() {
    int t;
    std::cin >> t;
    while (t--) {
        ll n;
        std::cin >> n;
        std::cout << n * (n + 1) << '\n';
    }
    return 0;
}