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Combinatorial Functions
 
Factorial (!) — factorial function (total arrangements of n objects)
Subfactorial — number of derangements of n objects, leaving none unchanged
FactorialPower — factorial power
Hyperfactorial — hyperfactorial function
Factorial2 (!!) — double factorial
    
Binomial — binomial coefficients
Multinomial — multinomial coefficients
CatalanNumber — Catalan numbers
    
StirlingS1, StirlingS2 — Stirling numbers
PartitionsP — number of partitions of an integer
BellB — Bell numbers
    
FrobeniusNumber — Frobenius number for a list
    
FiniteGroupCount, FiniteAbelianGroupCount — numbers of groups of given order
    
ClebschGordan  ▪ ThreeJSymbol  ▪ SixJSymbol
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