Extra-math - 🔸️Primorial & Alternating Factorial | Facebook
Mathematical Meanderings: Subfactorials, Semifactorials and Others
dℝ∅ℕ∋ on X: "@fermatslibrary The nth subfactorial is the number of permutations of n objects in which no object appears in its natural place. Long story short: it's alternating series of permutations.
Pin by Archana Kumari on mathematics | Mathematics, Math, Math equations
1. Recall that ni (called subfactorial) is the number | Chegg.com
code golf - Deranged !Combinatorics: Compute the Subfactorial - Code Golf Stack Exchange
Derangement Formula Proof | PDF | Permutation | Recurrence Relation
Pat'sBlog: The Subfactorial and Some Historical Notes
Factorial Calculator – Apps no Google Play
subfactorials
Derangement - Wikipedia
subfactorial & derangement, an explicit approach - YouTube
Subfactorial - Statistics How To
Derangements - Subfactorial Calculator - YouTube
Subfactorial - Statistics How To
Subfactorial / X
The CAT: Factorial basic concepts
Solved . Recall that ni (called subfactorial) is the number | Chegg.com
soft question - Does double subfactorial exist? - Mathematics Stack Exchange
subfactorials
Subfactorial -- from Wolfram MathWorld
