#include <iostream>
#include <fstream>
#define N 100001
using namespace std;
ifstream fin ("sum.in");
ofstream fout ("sum.out");


int main()
{
    int n, i, m, x, j, s;
    fin >> n;
    for(i=1; i<=n; i++)
    {
        fin >> x;
        m = 2*x;
        s = m*(m+1)/2;
        s =s - x;
        s =s - m;
        fout << s;
        fout << "\n";
    }
    return 0;
}