OFFSET
1,2
LINKS
Eric Weisstein's World of Mathematics, Chromatic Invariant
Eric Weisstein's World of Mathematics, King Graph
CROSSREFS
KEYWORD
nonn,more
AUTHOR
Eric W. Weisstein, Nov 16 2017
EXTENSIONS
a(6)-a(10) from Andrew Howroyd, Apr 23 2018
STATUS
approved