A147354 Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 0110-0110-1111 pattern in any orientation.

1, 1, 1, 5, 1, 9, 9, 64, 169, 2060, 1751, 117702, 30379, 5432661, 2655229, 490197084, 609857434, 163861816417, 142845961897, 117181491908400, 48229913065428, 107790147306614349, 44573112130566379, 164640449018425801557

Offset

1,4

Links

Table of n, a(n) for n=1..24.

Example

Maximal 8 X 8 example
.1.0.0.0.0.0.0.1
.1.1.1.0.0.1.1.1
.1.1.1.0.0.1.1.1
.1.0.0.0.0.0.0.1
.0.0.1.0.0.1.0.0
.1.1.1.0.0.1.1.1
.1.1.1.0.0.1.1.1
.0.0.1.0.0.1.0.0

Crossrefs

Sequence in context: A256559 A182498 A147406 * A134233 A100542 A324378

Adjacent sequences: A147351 A147352 A147353 * A147355 A147356 A147357

Keyword

nonn

Author

R. H. Hardin

Status

approved