board moves

#include<bits/stdc++.h>
#define sunil ios::sync_with_stdio(0);cin.tie(0); cout.tie(0)
using namespace std;
int main()
{
    sunil;
    int t;
    cin>>t;
    while(t--){
        int n,j;
        cin>>n;
        long long x,ans=0,mvs=1;
        for(int i=3;i<=n;i+=2){
         j=i-2;
            ans+=(i*i - j*j)*mvs;
            mvs++;
        }
        cout<<ans<<endl;
    }

}