id:A007855 - OEIS Search Results

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Infima closed sets in rooted plane trees on n nodes.

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1, 3, 13, 63, 326, 1769, 9964, 57843, 344203, 2090470, 12912988, 80899801, 512896540, 3284651548, 21217493460 (list; graph; listen)

	OFFSET	`1,2`
	REFERENCES	`M. Klazar, Twelve countings with rooted plane trees, European Journal of Combinatorics 18 (1997), 195-210; Addendum, 18 (1997), 739-740.`
	LINKS	`Index entries for sequences related to rooted trees`
	CROSSREFS	`Sequence in context: A001850 A130525 A000259 this_sequence A107097 A006923 A011272` `Adjacent sequences: A007852 A007853 A007854 this_sequence A007856 A007857 A007858`
	KEYWORD	`nonn`
	AUTHOR	`Martin Klazar (klazar(AT)kam.mff.cuni.cz)`

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Last modified July 26 13:41 EDT 2008. Contains 142293 sequences.