#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using P = pair<ll,ll>;
#define rep(i, n) for(ll i = 0; i < n; i++)
#define all(x) (x).begin(),(x).end()
template<class T>bool chmin(T&a, const T&b){if(a>b){a=b;return 1;}return 0;}
template<class T>bool chmax(T&a, const T&b){if(a<b){a=b;return 1;}return 0;}

int main(){
    int t,n = 1000001;
    cin >> t;
    vector<ll> ans(n);
    ans[2] = 0;
    for(ll i=3;i<n;i++){
        ans[i] = ans[i-1] + (i-1)*(i-2)*2;
    }
    rep(houren,t){
        int x;
        cin >> x;
        cout << ans[x] << endl;
    }
    return 0;
}