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!)
A126754 Number of biconnected graphs on n nodes with chromatic number 6. 1
0, 0, 0, 0, 0, 1, 4, 59, 1631, 101409, 13626123 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,7

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..11.

Keith M. Briggs, Combinatorial Graph Theory

CROSSREFS

A diagonal of triangle in A126749.

Sequence in context: A199107 A280668 A198508 * A264820 A194534 A331712

Adjacent sequences:  A126751 A126752 A126753 * A126755 A126756 A126757

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Feb 18 2007

EXTENSIONS

a(11) from Michael Sollami, Feb 18 2012

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 26 21:07 EST 2021. Contains 349344 sequences. (Running on oeis4.)