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!)
A126758 Number of biconnected 4-cycle-free graphs on n nodes with clique number 3. 0
0, 0, 1, 1, 4, 11, 39, 139, 603, 2925, 16709, 112054, 888615, 8321364 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,5

COMMENTS

It is possible that the definition should say "connected" rather than "biconnected". Should be rechecked! - Max Alekseyev and Brendan McKay, Jun 17 2008

LINKS

Table of n, a(n) for n=1..14.

Keith M. Briggs, Combinatorial Graph Theory

CROSSREFS

Sequence in context: A050987 A137191 A106269 * A149258 A326423 A149259

Adjacent sequences:  A126755 A126756 A126757 * A126759 A126760 A126761

KEYWORD

nonn,more

AUTHOR

N. J. A. Sloane, Feb 18 2007

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 April 9 17:35 EDT 2020. Contains 333361 sequences. (Running on oeis4.)