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A269561 Number of Hamiltonian cycles in K_{n} X K_{n}. 4
1, 48, 284112, 335750676480, 112249362914249932800, 14994936423694913432308324761600 (list; graph; refs; listen; history; text; internal format)
OFFSET

2,2

COMMENTS

Equivalently, the number of Hamiltonian cycles in the n X n rook graph.

LINKS

Table of n, a(n) for n=2..7.

Eric Weisstein's World of Mathematics, Hamiltonian Cycle

Eric Weisstein's World of Mathematics, Rook Graph

CROSSREFS

Cf. A269562, A096970, A003763, A222199.

Sequence in context: A282596 A272262 A146204 * A079234 A051235 A282403

Adjacent sequences:  A269558 A269559 A269560 * A269562 A269563 A269564

KEYWORD

nonn,more

AUTHOR

Andrew Howroyd, Feb 29 2016

STATUS

approved

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Last modified March 19 13:08 EDT 2019. Contains 321330 sequences. (Running on oeis4.)