id:A003467 - OEIS Search Results

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Number of minimal covers of an n-set.
(Formerly M3951)

+0
1

5, 28, 190, 1340, 9065, 57512, 344316, 1966440, 10813935, 57672340, 299893594, 1526727748, 7633634645, 37580965520, 182536112120, 876173330832 (list; graph; listen)

	OFFSET	`3,1`
	REFERENCES	`Hearne and Wagner, Minimal covers of finite sets, Discr. Math. 5 (1973), 247-251.`
	FORMULA	`G.f.: 1 + ( 1 - 4 x )^-4 + 3 ( 1 - x )^-4.`
	CROSSREFS	`Sequence in context: A123776 A070779 A024065 this_sequence A064898 A107875 A038172` `Adjacent sequences: A003464 A003465 A003466 this_sequence A003468 A003469 A003470`
	KEYWORD	`nonn`
	AUTHOR	`njas`

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Last modified July 25 07:41 EDT 2008. Contains 142293 sequences.

AT&T Labs Research