login
This site is supported by donations to The OEIS Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A036626 Number of 6-ary rooted trees with n nodes and height at most 9. 0
1, 1, 1, 2, 4, 9, 20, 48, 114, 283, 709, 1806, 4626, 11940, 30880, 80055, 207586, 538330, 1395080, 3612756, 9346541, 24157618, 62377353, 160914843, 414737061, 1068032468, 2748211066, 7066320945, 18156540077, 46621728265, 119639668421 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,4

LINKS

Table of n, a(n) for n=0..30.

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.

CROSSREFS

Sequence in context: A034823 A036625 A003019 * A036722 A318800 A318853

Adjacent sequences:  A036623 A036624 A036625 * A036627 A036628 A036629

KEYWORD

nonn,fini

AUTHOR

N. J. A. Sloane.

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified November 21 01:33 EST 2019. Contains 329349 sequences. (Running on oeis4.)