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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A036631 Number of 4-ary rooted trees with n nodes and height exactly 7. 0
0, 0, 0, 0, 0, 0, 0, 1, 6, 26, 94, 302, 900, 2546, 6931, 18341, 47474, 120750, 302741, 750050, 1839421, 4471759, 10787891, 25849612, 61564934, 145828769, 343713516, 806462038, 1884353462, 4386038531, 10172642984, 23515472829, 54190799650 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,9

LINKS

Table of n, a(n) for n=0..32.

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: A032169 A032196 A011780 * A224288 A036638 A036645

Adjacent sequences:  A036628 A036629 A036630 * A036632 A036633 A036634

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 19 11:46 EST 2019. Contains 329319 sequences. (Running on oeis4.)