A346414 - OEIS

A346414

Number of labeled totally ordered commutative semigroups.

1, 1, 4, 20, 114, 710, 4726, 33157, 243048, 1850817, 14590692 (list; graph; refs; listen; history; text; internal format)

	OFFSET	`0,3`
	LINKS	`Table of n, a(n) for n=0..10.` `Petr Gajdoš and Martin Kuřil, Ordered semigroups of size at most 7 and linearly ordered semigroups of size at most 10, Semigroup Forum, 89 (2014), 639-663.`
	CROSSREFS	`Cf. A023815.` `Sequence in context: A108447 A287512 A211248 * A028475 A128327 A320615` `Adjacent sequences: A346411 A346412 A346413 * A346415 A346416 A346417`
	KEYWORD	`nonn,hard,more`
	AUTHOR	`Peter Jipsen, Jul 15 2021`
	STATUS	`approved`

Last modified January 28 14:01 EST 2023. Contains 359895 sequences. (Running on oeis4.)