OFFSET
1,2
COMMENTS
Number of open directed king's tours on the n X n board.
LINKS
Ville H. Pettersson, Enumerating Hamiltonian Cycles, The Electronic Journal of Combinatorics, Volume 21, Issue 4, 2014.
Eric Weisstein's World of Mathematics, Hamiltonian Path
Eric Weisstein's World of Mathematics, King Graph
CROSSREFS
KEYWORD
nonn,more
AUTHOR
Eric W. Weisstein, Mar 23 2009
EXTENSIONS
a(5) from Max Alekseyev, May 03 2009
a(6)-a(11) from Andrew Howroyd, Nov 15 2015
STATUS
approved