What is a "subfactorial"? Links! February 08, 2020 Wikipedia linkWolfram link(Other) subfactorial blogOnline calculator Share Get link Facebook Twitter Pinterest Email Other Apps Share Get link Facebook Twitter Pinterest Email Other Apps
Formulas July 22, 2020 General formula: ! n = ( n -1 )[ !( n -1) + !( n -2) ] !0 = 1 !1 = 0 Read more
Is there a relationship between n! and !n? April 17, 2023 Yes. Oh, you want more. Right, then: and (even cooler [if that's possible!]!) Read more