login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A338708 Number of 4-linear trees on n nodes. 1
0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 6, 37, 158, 591, 1896, 5537, 14812, 37133, 87841, 198267, 429199, 896731, 1814978, 3572810, 6858774 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,11

REFERENCES

Wakhare, Tanay, Eric Wityk, and Charles R. Johnson. "The proportion of trees that are linear." Discrete Mathematics 343.10 (2020): 112008. Also arXiv:1901.08502v2. See Tables 1 and 2 (but beware errors).

LINKS

Table of n, a(n) for n=1..25.

CROSSREFS

Cf. A130131, A338706, A338707.

Sequence in context: A129651 A097297 A047670 * A129552 A293800 A327611

Adjacent sequences:  A338705 A338706 A338707 * A338709 A338710 A338711

KEYWORD

nonn,more

AUTHOR

N. J. A. Sloane, Nov 05 2020

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 September 21 00:14 EDT 2021. Contains 347596 sequences. (Running on oeis4.)