login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 59th year, we have over 358,000 sequences, and we’ve crossed 10,300 citations (which often say “discovered thanks to the OEIS”).

Other ways to Give
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A123406 Number of AT-free Berge perfect graphs on n nodes. 0
1, 2, 4, 11, 33, 144, 826, 6836, 76322, 1126575, 21410245, 521199672 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..12.

S. Hougardy, Home Page

S. Hougardy, Classes of perfect graphs, Discr. Math. 306 (2006), 2529-2571.

F. Hüffner, tinygraph, software for generating integer sequences based on graph properties, version 3e9b2ba.

CROSSREFS

Sequence in context: A005470 A123471 A123416 * A123453 A351157 A123459

Adjacent sequences: A123403 A123404 A123405 * A123407 A123408 A123409

KEYWORD

nonn,more

AUTHOR

N. J. A. Sloane, Oct 18 2006

EXTENSIONS

a(11) and a(12) added using tinygraph by Falk Hüffner, Jun 30 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 | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified December 5 13:58 EST 2022. Contains 358588 sequences. (Running on oeis4.)