A146470 Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 1110-0111 pattern in any orientation.

1, 1, 1, 1, 5, 7, 19, 35, 463, 969, 22041, 58321, 1701021, 5460085, 383363779, 1519453757, 207202049471, 1016198618209, 232688832421803, 1403058689772715, 628307720419918447, 4670279652295220195, 3965584480917103684129

Offset

1,5

Links

Table of n, a(n) for n=1..23.

Example

Maximal 8 X 8 example
.0.1.0.0.0.0.1.0
.0.1.1.0.0.1.1.0
.0.1.1.0.0.1.1.0
.0.0.1.0.0.1.0.0
.1.0.0.0.0.0.0.1
.1.1.0.0.0.0.1.1
.1.1.0.0.0.0.1.1
.0.1.0.0.0.0.1.0

Crossrefs

Sequence in context: A200178 A064101 A018581 * A296935 A106987 A342738

Adjacent sequences: A146467 A146468 A146469 * A146471 A146472 A146473

Keyword

nonn

Author

R. H. Hardin

Status

approved