OFFSET
1,2
LINKS
Andy Huchala, Table of n, a(n) for n = 1..255
Andy Huchala, Python program.
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, Independence Number.
CROSSREFS
KEYWORD
nonn,more
AUTHOR
N. J. A. Sloane, Dec 04 2014
EXTENSIONS
a(20)-a(24) from Eric W. Weisstein, May 21-25 2017
a(25)-a(58) from Andy Huchala, Mar 31 2024
STATUS
approved