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

 

Logo

Please make a donation to keep the OEIS running. We are now in our 56th year. In the past year we added 10000 new sequences and reached almost 9000 citations (which often say "discovered thanks to the OEIS").
Other ways to donate

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A204328 Number of cubic graphs on 2n nodes with nontrivial automorphism group. 2
1, 2, 5, 19, 80, 406, 2513, 19177, 182909 (list; graph; refs; listen; history; text; internal format)
OFFSET

2,2

COMMENTS

The smallest cubic graph with trivial automorphism group has 12 nodes. There are 5 such graphs. There are 103 cubic graphs on 14 nodes with trivial group. If we had more terms this sequence (A002851 - A204328) would warrant its own entry.

LINKS

Table of n, a(n) for n=2..10.

F. C. Bussemaker, S. Cobeljic, L. M. Cvetkovic and J. J. Seidel, Computer investigations of cubic graphs, T.H.-Report 76-WSK-01, Technological University Eindhoven, Dept. Mathematics, 1976.

CROSSREFS

Cf. A002851.

Sequence in context: A058131 A222055 A228569 * A288911 A138911 A181513

Adjacent sequences:  A204325 A204326 A204327 * A204329 A204330 A204331

KEYWORD

nonn,more

AUTHOR

N. J. A. Sloane, Jan 14 2012

EXTENSIONS

a(8)..a(10) from Meringer's genreg program. - R. J. Mathar, Oct 18 2018

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 24 07:14 EST 2020. Contains 338607 sequences. (Running on oeis4.)