#include <stdio.h>

int main()
{

    int i, a1 = 1, an;
    long double soma = 0, inicial, final;
    int num, quant;
    scanf("%d", &quant);
    for(i=0;i<quant;i++)
    {
        scanf("%d", &num);
        inicial = (num + 1)*num/2;
        final = inicial - num + 1;
        soma = (inicial + final) * num / 2;
        printf("%.Lf\n",soma);
    }

    return 0;
}