A147333 Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 01000-11100-00111-00010 pattern in any orientation.

1, 1, 1, 1, 1, 1, 1, 1, 11, 15, 249, 439, 3525, 7243, 86415, 202083, 5858179, 16166669, 860820947, 2825911051, 229675621375, 888780016627, 105005577010021, 476804047189207, 92035361068862489

Offset

1,9

Links

Table of n, a(n) for n=1..25.

Example

Maximal 9 X 9 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
.0.0.0.0.0.0.0.0.0
.0.0.1.0.0.0.1.0.0
.0.0.1.1.0.1.1.0.0
.0.1.1.0.0.0.1.1.0
.1.1.0.0.0.0.0.1.1
.0.1.0.0.0.0.0.1.0

Crossrefs

Sequence in context: A115779 A147339 A147377 * A097156 A138791 A132990

Adjacent sequences: A147330 A147331 A147332 * A147334 A147335 A147336

Keyword

nonn

Author

R. H. Hardin

Status

approved