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Binomial
/
Reference of Built-in Symbols
/
Integer Functions
/
Combinatorial Functions
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BellB
/
BellB
Bell number
(
SymPy
,
WMA
)
BellB
[
n
]
Bell number $B_n$.
BellB
[
n
,
x
]
Bell polynomial $B_n(x)$.
BellB[10]
BellB[5, x]
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Binomial