Pat'sBlog: The Subfactorial and Some Historical Notes
Subfactorial -- from Wolfram MathWorld
Maths Ed X પર: "The 265th, or subfactorial 6-th (!6-th) day of the year. There are 265 derangements of 6 objects: 265 ways 6 objects can be arranged so no object is
subfactorials
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.
Derangement - Wikipedia
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Subfactorial -- from Wolfram MathWorld
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Solved . Recall that ni (called subfactorial) is the number | Chegg.com
Subfactorial / X
PERMUTATION CALCULATOR DERANGEMENT CALCULATOR
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Subfactorial -- from Wolfram MathWorld
Pin by Archana Kumari on mathematics | Mathematics, Math, Math equations
Subfactorial -- from Wolfram MathWorld
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