OFFSET
1,4
LINKS
Andrew Howroyd, Table of n, a(n) for n = 1..15
Eric Weisstein's World of Mathematics, Knight Graph
Eric Weisstein's World of Mathematics, Total Dominating Set
CROSSREFS
KEYWORD
nonn
AUTHOR
Eric W. Weisstein, Apr 19 2018
EXTENSIONS
Terms a(6) and beyond from Andrew Howroyd, Apr 20 2018
STATUS
approved