id:A038018 - OEIS Search Results

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Triangle: T(n,k), k<=n: groupoids with n elements and k idempotents.

+0
4

1, 0, 1, 3, 4, 3, 978, 1485, 729, 138, 56630832, 75503872, 37755904, 8390656, 700688, 813802235250650, 1017252851596875 (list; table; graph; listen)

	OFFSET	`0,4`
	LINKS	`Index entries for sequences related to groupoids`
	CROSSREFS	`Cf. A001329, A030247, A030250, A030253.` `Adjacent sequences: A038015 A038016 A038017 this_sequence A038019 A038020 A038021` `Sequence in context: A077628 A051508 A084252 this_sequence A108658 A021748 A132723`
	KEYWORD	`nonn,tabl`
	AUTHOR	`Christian G. Bower (bowerc(AT)usa.net), May 15 1998.`

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Last modified October 13 02:37 EDT 2008. Contains 145008 sequences.

AT&T Labs Research