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A084965 Number of labeled totally ordered semigroups with n elements. +0
1
1, 1, 6, 44, 386, 3852, 42640, 516791, 6817378 (list; graph; listen)
OFFSET

0,3
LINKS

J. Slaney, FINDER: Finite Domain Enumerator

CROSSREFS

Cf. A023814.

Sequence in context: A052204 A147688 A090442 this_sequence A124996 A001852 A065783

Adjacent sequences: A084962 A084963 A084964 this_sequence A084966 A084967 A084968

KEYWORD

nonn,hard

AUTHOR

Michael Somos, Jun 15 2003

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Last modified December 20 16:54 EST 2009. Contains 171081 sequences.

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