1,4

a(8) = 13267364410532.

Table of n, a(n) for n=1..6.

Eric Weisstein's World of Mathematics, Graph Cycle

Eric Weisstein's World of Mathematics, Knight Graph

a(2*n) = A001230(n) for A001230(n) > 0. - Andrew Howroyd, Apr 16 2018

Cf. A001230.

Sequence in context: A027049 A060219 A185760 * A014732 A135794 A161851

Adjacent sequences: A301646 A301647 A301648 * A301650 A301651 A301652

nonn,more

Eric W. Weisstein, Mar 25 2018

approved