id:A038022 - OEIS Search Results

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Triangle: T(n,k), k<=n: commutative groupoids with no symmetry with n elements and k idempotents.

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1, 0, 1, 1, 2, 1, 35, 51, 27, 3, 13776, 18330, 9152, 2016, 164, 83306272, 104124850, 52056277, 13006746, 1622527, 80461 (list; table; graph; listen)

	OFFSET	`0,5`
	LINKS	`Index entries for sequences related to groupoids`
	CROSSREFS	`Cf. A001329, A001425, A030258, A030261, A030264.` `Sequence in context: A113465 A113456 A127608 this_sequence A038021 A127609 A100018` `Adjacent sequences: A038019 A038020 A038021 this_sequence A038023 A038024 A038025`
	KEYWORD	`nonn,tabl,more`
	AUTHOR	`Christian G. Bower (bowerc(AT)usa.net), May 15 1998.`

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Last modified November 27 22:38 EST 2009. Contains 167602 sequences.

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