OFFSET
1,4
COMMENTS
Also, number of n-node simple graphs having independence number 3. - Andrew Howroyd, Oct 31 2017
LINKS
Keith M. Briggs, Combinatorial Graph Theory
Eric Weisstein's World of Mathematics, Clique Number.
CROSSREFS
KEYWORD
nonn,more
AUTHOR
EXTENSIONS
2 more terms from Eric W. Weisstein, Nov 03 2002
a(10) from Keith Briggs, Mar 15 2006
a(11) from Michael Sollami, Jan 29 2012
a(12) from Michael Sollami, Mar 26 2012
a(13) from Brendan McKay, May 07 2018
STATUS
approved