A341499 Number of Hamiltonian cycles in the 4 X n rook graph.

3, 30, 1566, 284112, 122330880, 112777827840, 196166156901120, 593448176589649920, 2927894041560795955200, 22384255485528968471838720, 254368264421726727280223846400, 4150617533254451866274537825894400, 94460232869419006706028435289512345600

Offset

1,1

Links

Table of n, a(n) for n=1..13.

Crossrefs

Column 4 of A269562.

Sequence in context: A203478 A012008 A335710 * A203415 A203520 A238767

Adjacent sequences: A341496 A341497 A341498 * A341500 A341501 A341502

Keyword

nonn

Author

Andrew Howroyd, Feb 21 2021

Status

approved