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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A036641 Number of 6-ary rooted trees with n nodes and height exactly 3. 0
0, 0, 0, 1, 2, 4, 6, 10, 14, 19, 24, 31, 37, 46, 52, 61, 68, 76, 81, 88, 90, 94, 94, 94, 90, 88, 81, 76, 68, 61, 52, 46, 37, 31, 24, 19, 14, 11, 7, 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..43.

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: A007782 A035501 A024204 * A260732 A062425 A121386

Adjacent sequences:  A036638 A036639 A036640 * A036642 A036643 A036644

KEYWORD

nonn,fini,full

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 October 21 14:13 EDT 2019. Contains 328301 sequences. (Running on oeis4.)