package main

import (
	"bufio"
	"fmt"
	"os"
	"strconv"
)

var sc = bufio.NewScanner(os.Stdin)
var out = bufio.NewWriter(os.Stdout)

func main() {
	//bufサイズ以上の文字列入力が必要な場合は拡張すること
	buf := make([]byte, 9*1024*1024)
	sc.Buffer(buf, bufio.MaxScanTokenSize)
	sc.Split(bufio.ScanWords)

	t := nextInt()
	var ans []int
	for i := 0; i < t; i++ {
		n := nextInt()
		ans = append(ans, solve(n))
	}
	PrintVertically(ans)
}

func solve(n int) int {
	return n * (n + 1)
}

func nextInt() int {
	sc.Scan()
	i, _ := strconv.Atoi(sc.Text())
	return int(i)
}

func PrintInt(x int) {
	defer out.Flush()
	fmt.Fprintln(out, x)
}

func PrintVertically(x []int) {
	defer out.Flush()
	for _, v := range x {
		fmt.Fprintln(out, v)
	}
}