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A000532 Number of Hamiltonian paths from NW to SW corners in an n X n grid. 12
1, 1, 2, 8, 86, 1770, 88418, 8934966, 2087813834, 1013346943033, 1111598871478668, 2568944901392936854, 13251059359839620127088, 145194816279817259193401518, 3524171261632305641165676374930 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

COMMENTS

Walks reaching each cell exactly once.

REFERENCES

Douglas M. McKenna, Tendril Motifs for Space-Filling, Half-Domino Curves, in Bridges Conference Proceedings, 2016; http://archive.bridgesmathart.org/2016/bridges2016-119.pdf

LINKS

KeyTo9(AT)Fans, Table of n, a(n) for n = 1..18

KeyTo9(AT)Fans, Chinese web page giving the sequence up to 18 items

CROSSREFS

Main diagonal of A271592.

Cf. A181688, A181689, A014524, A014585.

Cf. A001184, A145157, A120443, A003763, A271507, A007764, A121785, A121789.

Sequence in context: A261730 A052456 A276991 * A083831 A134245 A141313

Adjacent sequences:  A000529 A000530 A000531 * A000533 A000534 A000535

KEYWORD

nonn

AUTHOR

Russ Cox

EXTENSIONS

More terms from Du, Zhao Hui, Jul 08 2008

Edited by Franklin T. Adams-Watters, Jul 03 2009

Name clarified by Andrew Howroyd, Apr 10 2016

STATUS

approved

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Last modified September 23 21:30 EDT 2017. Contains 292392 sequences.