A147437 Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 1010-1111-1010 pattern in any orientation.

1, 1, 1, 1, 5, 1, 19, 11, 496, 277, 13622, 3725, 625566, 100329, 46290886, 7689337

Offset

1,5

Links

Table of n, a(n) for n=1..16.

Example

Maximal 8 X 8 example
.0.0.0.0.0.0.0.0
.0.0.0.0.0.0.0.0
.0.0.0.0.0.0.0.0
.0.0.0.0.0.0.0.0
.0.1.0.0.0.0.1.0
.1.1.1.0.0.1.1.1
.0.1.0.0.0.0.1.0
.1.1.1.0.0.1.1.1

Crossrefs

Sequence in context: A193857 A146055 A286232 * A147369 A066480 A136394

Adjacent sequences: A147434 A147435 A147436 * A147438 A147439 A147440

Keyword

nonn

Author

R. H. Hardin

Status

approved