#include<bits/stdc++.h>
using namespace std;
long long ans1[1000006];
long long ans2[1000006];

int main(){
  ios::sync_with_stdio(false);
  cin.tie(nullptr);
  ans1[3]=2,ans2[3]=2;
  for(long long i=4;i<1000006;i++){
    ans1[i]=ans1[i-1]+(i-2)*(i-1);
    ans2[i]=ans2[i-1]+(i-2)*(i-1);
  }
  int test_case;
  cin>>test_case;
  while (test_case--){
    int N;
    cin>>N;
    cout<<ans1[N]+ans2[N]<<'\n';
  }
}