A238117 Number of states with reflective symmetry arising in matrix method for enumerating Hamiltonian cycles on 2n X 2n grid.

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

Offset: 1

Author

N. J. A. Sloane, Mar 05 2014

Keywords

• nonn
• more

Links

• 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.