#include <bits/stdc++.h>
#define ll long long
using namespace std;

int main()
{
  ll t,n;
  cin>>t;
  while(t--){
      cin>>n;
      ll ans=0;
      for(int i=0;i<n;i++){
          ans+=i*n+(i+1);
      }
      cout<<ans<<"\n";
      
     
      
  }
   
      return 0;
}