#include <bits/stdc++.h>
#define ll               long long int 
#define loop(a,b,i)      for(long long int i=a;i<b;i++)
#define loopr(a,b,i)     for(long long int i=a;i>=b;i--)
#define cn               continue;
#define pb               push_back
#define db               double
#define mp               make_pair
#define sz(x)            (ll)((x).size())
#define endl             "\n"
#define lb               lower_bound
#define ub               upper_bound
#define f                first
#define se               second
#define vll              vector<ll>
#define pll              pair<ll,ll>
#define vpll             vector< pair<ll,ll> >
#define all(x)           x.begin(),x.end()
#define print(a,n)       for(ll i=0; i<n; i++) cout<<a[i]<<" "; cout<<endl;
#define pi               3.14159265358979323846
#define quick            ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL)
 
const ll mod = 1000000007;
const ll MAX  = 8000000000000000064LL;
const ll MIN  = -8000000000000000064LL;
ll add(ll x, ll y) {ll res = x + y; return (res >= mod ? res - mod : res);}
ll mul(ll x, ll y) {ll res = x * y; return (res >= mod ? res % mod : res);}
ll sub(ll x, ll y) {ll res = x - y; return (res < 0 ? res + mod : res);}
ll power(ll x, ll y) {ll res = 1; x %= mod; while (y) {if (y & 1)res = mul(res, x); y >>= 1; x = mul(x, x);} return res;}
ll mod_inv(ll x) {return power(x, mod - 2);}
ll gcd(ll a,ll b) {if(b==0)return a; return gcd(b,a%b);}
ll lcm(ll x, ll y) { ll res = x / gcd(x, y); return (res * y);}
// ll nCr(ll n,ll r){ll ans=fact[n]; ans*=mod_inv(fact[n-r]);ans%=mod; ans*=mod_inv(fact[r]);ans%=mod; return ans;}
using namespace std; 
 
const ll dx[] = {-1,1,0,0,1,1,-1,-1};
const ll dy[] = {0,0,1,-1,-1,1,-1,1};
 
bool isprime(ll n) {  
    if(n<=1) return false; 
    if(n==2) return true;
    if(n%2==0 and n!=2) return false;
    for(ll i=2;i<=sqrt(n);i++) 
        if(n%i==0) 
            return false; 
    return true; 
} 
 
bool isPowerOfTwo(ll n) {
   if(n==0) return false; 
   return (ceil(log2(n)) == floor(log2(n)));  
}

signed main() 
{ quick; 

    int tc = 1;
    cin >> tc; 
    loop(0,tc,Q)
    {   
        // cout << "Case #" << Q+1 << ": ";
        unsigned long long n; cin >> n;
        n -= 2;
        unsigned long long x = (n*(n+1)*(n+2))/6;
        x *= 4;
        cout << x << endl;
    }
        
 
cerr << "time taken : " << (float)clock() / CLOCKS_PER_SEC << " secs" << endl;
return 0;
}