package main

import . "fmt"
import . "os"
import bf "bufio"

func main() {
	rd := bf.NewReader(Stdin)
	var t int
	Fscan(rd, &t)
	for ; t > 0; t-- {
		var n int
		Fscan(rd, &n)
		if n % 2 != 0 {
			Println(0)
		} else {
			Println(n * (n/2-1))
		}
	}
}