id:A036610 - OEIS Search Results

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Number of 4-ary rooted trees with n nodes and height at most 5.

+0
1

1, 1, 1, 2, 4, 9, 18, 39, 80, 165, 331, 664, 1307, 2569, 4983, 9624, 18416, 35060, 66218, 124411, 232138, 430783, 794431, 1457063, 2656709, 4817940, 8688296, 15584381, 27802598, 49340196, 87100640, 152968396, 267264610, 464600889 (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: A018097 A079580 A018000 this_sequence A038044 A026732 A094291` `Adjacent sequences: A036607 A036608 A036609 this_sequence A036611 A036612 A036613`
	KEYWORD	`nonn,fini`
	AUTHOR	`N. J. A. Sloane (njas(AT)research.att.com).`

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.

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