A238118 Number of continuations with reflective symmetry arising in matrix method for enumerating Hamiltonian cycles on 2n X 2n grid.

1, 6, 20, 101, 327, 1560, 5333, 24727, 88422, 403552

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, A238117.

Sequence in context: A191424 A333048 A200538 * A211953 A266846 A207819

Adjacent sequences: A238115 A238116 A238117 * A238119 A238120 A238121

Keyword

nonn,hard,more

Author

N. J. A. Sloane, Mar 05 2014

Status

approved