OFFSET
2,2
COMMENTS
a(5) is also the chromatic invariant of the 2-Keller graph. - Eric W. Weisstein, Mar 21 2018
LINKS
Eric Weisstein's World of Mathematics, Chromatic Invariant
Eric Weisstein's World of Mathematics, Folded Cube Graph
Eric Weisstein's World of Mathematics, Keller Graph
CROSSREFS
KEYWORD
nonn,more
AUTHOR
Eric W. Weisstein, Nov 16 2017
STATUS
approved