id:A036614 - OEIS Search Results

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Number of 4-ary rooted trees with n nodes and height at most 9.

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1

1, 1, 1, 2, 4, 9, 19, 45, 106, 260, 642, 1614, 4074, 10356, 26341, 67093, 170735, 434149, 1102279, 2794856, 7075440, 17887216, 45157381, 113859010, 286737286, 721310274, 1812628225, 4550676482, 11414249153, 28605296518, 71629527442 (list; graph; listen)

	OFFSET	`0,4`
	LINKS	`E. M. Rains and N. J. A. Sloane, On Cayley's Enumeration of Alkanes (or 4-Valent Trees), J. Integer Sequences, Vol. 2 (1999), Article 99.1.1.` `Index entries for sequences related to rooted trees`
	CROSSREFS	`Sequence in context: A036611 A036612 A036613 this_sequence A036718 A134964 A052328` `Adjacent sequences: A036611 A036612 A036613 this_sequence A036615 A036616 A036617`
	KEYWORD	`nonn,fini`
	AUTHOR	`njas`

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Last modified July 25 02:12 EDT 2008. Contains 142294 sequences.

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