A036627 - OEIS

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A036627

Number of 4-ary rooted trees with n nodes and height exactly 3.

0, 0, 0, 1, 2, 4, 6, 8, 9, 11, 11, 12, 11, 11, 9, 8, 6, 5, 3, 2, 1, 1 (list; graph; refs; listen; history; text; internal format)

	OFFSET	`0,5`
	LINKS	`Table of n, a(n) for n=0..21.` `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: A070089 A069167 A217352 * A191982 A080037 A184012` `Adjacent sequences: A036624 A036625 A036626 * A036628 A036629 A036630`
	KEYWORD	`nonn,fini,full`
	AUTHOR	`N. J. A. Sloane.`
	STATUS	`approved`

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Last modified June 19 18:16 EDT 2013. Contains 226415 sequences.