Table of n, a(n) for n=3..9.
Eric Weisstein's World of Mathematics, Black Bishop Graph
Eric Weisstein's World of Mathematics, Hamiltonian Cycle
Cf. A282890 (numbers of Hamiltonian cycles in an n X n white bishop graph)
Sequence in context: A160103 A283902 A064073 * A225068 A270145 A201492
Adjacent sequences: A282886 A282887 A282888 * A282890 A282891 A282892
Eric W. Weisstein, Feb 24 2017
a(9) from Andrew Howroyd, May 06 2017