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!)
A123411 Number of C_4-free Berge perfect graphs on n nodes. 0

%I #8 Jun 30 2018 14:53:04

%S 1,2,4,10,27,95,398,2164,14945,131562,1454388,20019052,341159201

%N Number of C_4-free Berge perfect graphs on n nodes.

%H S. Hougardy, <a href="http://dx.doi.org/10.1016/j.disc.2006.05.021">Classes of perfect graphs</a>, Discr. Math. 306 (2006), 2529-2571.

%H F. Hüffner, <a href="https://github.com/falk-hueffner/tinygraph">tinygraph</a>, software for generating integer sequences based on graph properties, version 7289304.

%K nonn

%O 1,2

%A _N. J. A. Sloane_, Oct 18 2006

%E a(11)-a(13) added using tinygraph by _Falk Hüffner_, Jun 30 2018

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 28 22:04 EDT 2024. Contains 371254 sequences. (Running on oeis4.)