#pragma GCC target("avx2")
#pragma GCC optimize("O3")
#pragma GCC optimize("unroll-loops")
#include<bits/stdc++.h>
#include<atcoder/all>
using namespace std;
using namespace atcoder;
using ll=long long;
using ld=long double;
using T=tuple<ld,ll,ll>;

void IO(){
  ios::sync_with_stdio(false);
  std::cin.tie(nullptr);
}

int main(){
  IO();
  ll t;
  cin>>t;
  while(t--){
    ll n;
    cin>>n;
    if(n%2!=0){
      cout<<0<<endl;
      continue;
    }
    ll ans=n/2*(n-2);
    cout<<ans<<endl;
  }
}