OFFSET
1,2
LINKS
Stan Wagon, Graph Theory Problems from Hexagonal and Traditional Chess, The College Mathematics Journal, Vol. 45, No. 4, September 2014, pp. 278-287
Eric Weisstein's World of Mathematics, Domination Number
CROSSREFS
KEYWORD
nonn,more
AUTHOR
N. J. A. Sloane, Dec 04 2014
EXTENSIONS
a(20) = 30 from Eric W. Weisstein, Mar 04 2016
a(21)-a(26) and new name from Eric W. Weisstein, Sep 14-19 2021
STATUS
approved