#include <bits/stdc++.h>
#include <atcoder/all>
using namespace std;
using namespace atcoder;
using ll = long long;
using ld = long double;
using mint = modint998244353;

void solve() {
  ll N; cin >> N;
  cout << (N % 2 ? 0: N / 2 * (N - 2)) << endl;
}
int main() {
  int T; cin >> T;
  while (T--) {
    solve();
  }
  return 0;
}