A036653 - OEIS

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A036653

Number of 6-valent trees with n nodes.

0, 1, 1, 1, 2, 3, 6, 11, 22, 45, 101, 223, 520, 1223, 2954, 7208, 17905, 44863, 113738, 290605, 748711, 1941592, 5067433, 13297590, 35074788, 92939166, 247317085, 660681399, 1771321949, 4764829720, 12857155911, 34793296227 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,5`
	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 trees`
	CROSSREFS	`Sequence in context: A132831 A007477 A096202 * A123769 A093304 A036590` `Adjacent sequences: A036650 A036651 A036652 * A036654 A036655 A036656`
	KEYWORD	`nonn`
	AUTHOR	`N. J. A. Sloane (njas(AT)research.att.com).`

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Last modified February 16 20:38 EST 2012. Contains 205962 sequences.