Table of n, a(n) for n=3..9.
Eric Weisstein's World of Mathematics, Hamiltonian Cycle
Eric Weisstein's World of Mathematics, White Bishop Graph
Cf. A282889 (number of Hamiltonian cycles in an n X n black bishop graphs)
Sequence in context: A076985 A120802 A120838 * A004491 A132573 A322142
Adjacent sequences: A282887 A282888 A282889 * A282891 A282892 A282893
Eric W. Weisstein, Feb 24 2017
a(9) from Andrew Howroyd, May 06 2017