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A341498 Number of Hamiltonian cycles in the 3 X n rook graph. 2
1, 3, 48, 1566, 126120, 18153720, 4357332000, 1619499374640, 883124275824000, 677267024315091840, 706022078404964428800, 972890835488032591468800, 1731258722423272253052441600, 3900512495412914495014418918400, 10938873545450798558110852249497600 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Andrew Howroyd, Table of n, a(n) for n = 1..30

CROSSREFS

Column 3 of A269562.

Sequence in context: A199012 A304208 A300871 * A201698 A356612 A295813

Adjacent sequences:  A341495 A341496 A341497 * A341499 A341500 A341501

KEYWORD

nonn

AUTHOR

Andrew Howroyd, Feb 21 2021

STATUS

approved

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Last modified September 25 06:22 EDT 2022. Contains 356959 sequences. (Running on oeis4.)