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!)
A126756 Number of biconnected triangle-free graphs on n nodes with chromatic number 3. 0
0, 0, 0, 0, 1, 1, 8, 36, 269, 2418, 29216, 458445, 9373692, 249530113 (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
CROSSREFS
Sequence in context: A032770 A032794 A000757 * A203297 A181072 A058823
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 | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified April 24 03:06 EDT 2024. Contains 371918 sequences. (Running on oeis4.)