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Search: id:A036653
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A036653 Number of 6-valent trees with n nodes. +0
1
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; listen)
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 this_sequence A123769 A093304 A036590

Adjacent sequences: A036650 A036651 A036652 this_sequence A036654 A036655 A036656

KEYWORD

nonn

AUTHOR

njas

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Last modified July 26 23:19 EDT 2008. Contains 142293 sequences.


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