#include <iostream>
#include <vector>
#include <algorithm>
using namespace std;
using i64 = long long;
using u64 = unsigned long long;
using i32 = int;
using u32 = unsigned int;
#define rep(i,n) for(int i=0; i<(n); i++)

void testcase(){
    i64 N; cin >> N;
    i64 ans = N * (N-1) * (2*N-1) / 3 - N * (N-1);
    cout << ans << "\n";
}

int main() {
    int T; cin >> T;
    while(T--) testcase();
    return 0;
}



struct ios_do_not_sync{
    ios_do_not_sync(){
        std::ios::sync_with_stdio(false);
        std::cin.tie(nullptr);
    }
} ios_do_not_sync_instance;