A147224 Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 11011-01110 pattern in any orientation.

1, 1, 1, 1, 15, 5, 62, 17, 602, 89, 29524, 5783, 1544922, 270221, 203301503, 19830584, 60493044496, 4522566093, 26251057879932, 1590451774176, 23899128298949817, 1088025398592657

Offset

1,5

Links

Table of n, a(n) for n=1..22.

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
.1.0.0.0.0.0.0.1
.1.1.0.0.0.0.1.1
.0.1.0.0.0.0.1.0
.1.1.0.0.0.0.1.1
.1.0.0.0.0.0.0.1

Crossrefs

Sequence in context: A147422 A147084 A147361 * A147060 A110791 A241361

Adjacent sequences: A147221 A147222 A147223 * A147225 A147226 A147227

Keyword

nonn

Author

R. H. Hardin, Nov 04 2008

Status

approved