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

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A123418 Number of dart-free Berge perfect graphs on n nodes. 0
1, 2, 4, 11, 32, 124, 512, 2495, 13245, 79734, 538052, 4171519, 37767142 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..13.

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: A056325 A345207 A103293 * A123412 A074408 A123425

Adjacent sequences: A123415 A123416 A123417 * A123419 A123420 A123421

KEYWORD

nonn,more

AUTHOR

N. J. A. Sloane, Oct 18 2006

EXTENSIONS

a(11)-a(13) added using tinygraph by Falk Hüffner, Jun 29 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 March 29 01:21 EDT 2023. Contains 361596 sequences. (Running on oeis4.)