A307920 Number of (undirected) Hamiltonian cycles in the n X n black bishop graph.
0, 0, 4, 704, 553008, 13802629632, 1782158930138112, 14231924675064000331776
Offset: 2
Links
- Eric Weisstein's World of Mathematics, Black Bishop Graph
- Eric Weisstein's World of Mathematics, Hamiltonian Cycle
Formula
a(n) = A282889(n)/2.
Extensions
Offset corrected and a(2) prepended by Pontus von Brömssen, Nov 22 2020