id:A038019 - OEIS Search Results

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

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1, 0, 1, 1, 4, 1, 969, 1431, 729, 108, 56615456, 75491208, 37741600, 8386560, 697501 (list; table; graph; listen)

	OFFSET	`0,5`
	LINKS	`Index entries for sequences related to groupoids`
	CROSSREFS	`Cf. A001329, A030248, A030251, A030271.` `Sequence in context: A125083 A094423 A094337 this_sequence A164804 A036115 A056582` `Adjacent sequences: A038016 A038017 A038018 this_sequence A038020 A038021 A038022`
	KEYWORD	`nonn,tabl,more`
	AUTHOR	`Christian G. Bower (bowerc(AT)usa.net), May 15 1998.`

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Last modified December 19 21:04 EST 2009. Contains 171054 sequences.