OFFSET
2,3
LINKS
Eric Weisstein's World of Mathematics, Chromatic Invariant
Eric Weisstein's World of Mathematics, Johnson Graph
Eric Weisstein's World of Mathematics, Triangular Graph
CROSSREFS
KEYWORD
nonn,more
AUTHOR
Eric W. Weisstein, Nov 16 2017
EXTENSIONS
a(7) from Andrew Howroyd, Apr 23 2018
STATUS
approved