#include <stdio.h>
#include <bits/stdc++.h>
#include <atcoder/all>
using namespace atcoder;
using mint = modint998244353;
using namespace std;
#define rep(i,n) for(int i=0;i<(n);i++)
#define Inf 1000000001

long long dp[1000005];

int main(){
	
	for(int i=2;i<=1000000;i++){
		dp[i] = dp[i-1];
		long long temp = i-1;
		temp *= i-2;
		dp[i] += temp*2;
		//dp[i] += temp;
		//dp[i] += temp;
	}
	
	int _t;
	cin>>_t;
	
	rep(_,_t){
		int n;
		cin>>n;
		cout<<dp[n]<<endl;
	}
	
	return 0;
}