login
This site is supported by donations to The OEIS Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A076279 Number of 3-chromatic (i.e., chromatic number equals 3) simple graphs on n nodes. 9
0, 0, 1, 3, 16, 84, 579, 5721, 87381, 2104349, 78315231 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,4

LINKS

Table of n, a(n) for n=1..11.

Keith M. Briggs, Combinatorial Graph Theory

Eric Weisstein's World of Mathematics, n-Chromatic Graph

CROSSREFS

Cf. A076278, A076280, A076281, A076282, A115597.

Sequence in context: A025187 A151328 A277923 * A056369 A056360 A278681

Adjacent sequences:  A076276 A076277 A076278 * A076280 A076281 A076282

KEYWORD

nonn,more

AUTHOR

Eric W. Weisstein, Oct 06 2002

EXTENSIONS

a(10) from Keith Briggs, Mar 14 2006

a(11) from Michael Sollami, Jan 28 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 | More pages
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy .

Last modified February 20 12:12 EST 2018. Contains 299387 sequences. (Running on oeis4.)