A238816 Number of Hamiltonian cycles on 2n X 2n grid with at least the symmetry of reflection in an axis.

1, 4, 44, 2828, 564468, 754425400, 3079904455096, 88444819222239178, 7685637690960745082050, 4793315937811919497089287562

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.