发布时间 ： 2019-04-29 14:20:20 UTC
类别 ： Algebraic
Page Views: 71 views
Double factor online calculator
Description: Enter numbers using a comma (,) or a space or a tab or a separate line.
The double-stage multiplication "m!!" is indicated. When m is a natural number, it represents the product of all positive integers that do not exceed m and have the same parity as m.
Example:
3!!=1 * 3=3
5!!=1 * 3 * 5=15
6!!=2 * 4 * 6=48
8!!=2 * 4 * 6 * 8=384
另0!!=1!!=1