Unsigned Lah numbers

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The unsigned Lah numbers $L(n,k)$ are defined by $$L(n,k)={{n-1} \choose {k-1}} \dfrac{n!}{k!},$$ where ${{n-1} \choose {k-1}}$ denotes a binomial coefficient and $n!$ denotes the factorial.

Properties

See also

Signed Lah numbers

References