#include<cstdio>
#include<iostream>
#include<cstring>
#include<algorithm>
#define ll long long
using namespace std;

int main()
{
    int t,n;
    cin>>t;
    while(t--){
        cin>>n;
        ll ans=n;
        for(int i=0;i<=n-2;i++)
            ans+=(ll)i*(n-2-i)*(n-1-i)/2;
        cout<<ans<<endl;
    }
    return 0;
}