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A238118 Number of continuations with reflective symmetry arising in matrix method for enumerating Hamiltonian cycles on 2n X 2n grid. 3
1, 6, 20, 101, 327, 1560, 5333, 24727, 88422, 403552 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..10.

Ed Wynn, Enumeration of nonisomorphic Hamiltonian cycles on square grid graphs, arXiv preprint arXiv:1402.0545, 2014

CROSSREFS

Cf. A003763, A143246, A209077, A222065, A238115-A238117.

Sequence in context: A151485 A191424 A200538 * A211953 A266846 A207819

Adjacent sequences:  A238115 A238116 A238117 * A238119 A238120 A238121

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Mar 05 2014

STATUS

approved

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Last modified November 22 01:14 EST 2019. Contains 329383 sequences. (Running on oeis4.)