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A307920 Number of (undirected) Hamiltonian cycles in the n X n black bishop graph. 0
0, 0, 4, 704, 553008, 13802629632, 1782158930138112, 14231924675064000331776 (list; graph; refs; listen; history; text; internal format)
OFFSET

2,3

LINKS

Table of n, a(n) for n=2..9.

Eric Weisstein's World of Mathematics, Black Bishop Graph

Eric Weisstein's World of Mathematics, Hamiltonian Cycle

FORMULA

a(n) = A282889(n)/2.

CROSSREFS

Cf. A282889, A307929.

Sequence in context: A183150 A202368 A114765 * A159618 A219012 A059754

Adjacent sequences:  A307917 A307918 A307919 * A307921 A307922 A307923

KEYWORD

nonn,hard,more

AUTHOR

Eric W. Weisstein, May 06 2019

EXTENSIONS

Offset corrected and a(2) prepended by Pontus von Brömssen, Nov 22 2020

STATUS

approved

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Last modified December 6 04:20 EST 2021. Contains 349562 sequences. (Running on oeis4.)