A238819 - OEIS

The OEIS is supported by the many generous donors to the OEIS Foundation.

A238819

Number of Hamiltonian cycles on 4n+2 X 4n+2 grid with at least 90-degree rotational symmetry.

1, 2, 204, 510718, 31008619522, 43911490791183200, 1424639466911800364132674, 1048492580133908850434091619741314 (list; graph; refs; listen; history; text; internal format)

	OFFSET	`0,2`
	LINKS	`Table of n, a(n) for n=0..7.` `Ed Wynn, Enumeration of nonisomorphic Hamiltonian cycles on square grid graphs, arXiv preprint arXiv:1402.0545 [math.CO], 2014.`
	CROSSREFS	`Cf. A003763.` `Sequence in context: A349982 A209185 A216608 * A110899 A281126 A220940` `Adjacent sequences: A238816 A238817 A238818 * A238820 A238821 A238822`
	KEYWORD	`nonn`
	AUTHOR	`N. J. A. Sloane, Mar 05 2014`
	EXTENSIONS	`a(5)-a(7) from Andrew Howroyd, Apr 06 2016`
	STATUS	`approved`

License Agreements, Terms of Use, Privacy Policy. .

Last modified March 20 22:57 EDT 2023. Contains 361392 sequences. (Running on oeis4.)