The OEIS mourns the passing of Jim Simons and is grateful to the Simons Foundation for its support of research in many branches of science, including the OEIS.
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!)
A348620 Total of the chromatic numbers of all simple graphs on n nodes. 0
1, 3, 8, 26, 94, 476, 3487, 44110, 1042221, 48069505 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
LINKS
Table of n, a(n) for n=1..10.
Eric Weisstein's World of Mathematics, Chromatic Number
Eric Weisstein's World of Mathematics, Simple Graph
FORMULA
a(n) = Sum_{k=1..n} k*A084268(n,k). - Andrew Howroyd, Jan 10 2022
CROSSREFS
Cf. A084268.
Sequence in context: A124528 A320344 A006870 * A058802 A054097 A238243
Adjacent sequences: A348617 A348618 A348619 * A348621 A348622 A348623
KEYWORD
nonn,more
AUTHOR
Eric W. Weisstein, Oct 25 2021
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 June 7 22:01 EDT 2024. Contains 373206 sequences. (Running on oeis4.)