A238117 - OEIS

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A238117

Number of states with reflective symmetry arising in matrix method for enumerating Hamiltonian cycles on 2n X 2n grid.

3

1, 4, 14, 40, 120, 320, 946, 2496, 7418, 19616

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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 [math.CO], 2014.

CROSSREFS

Cf. A003763, A143246, A209077, A222065, A238115, A238116, A238118.

Sequence in context: A281766 A072674 A202900 * A032285 A196451 A196480

Adjacent sequences: A238114 A238115 A238116 * A238118 A238119 A238120

KEYWORD

nonn,more

AUTHOR

N. J. A. Sloane, Mar 05 2014

STATUS

approved