A147012 Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 01000-11111-00010 pattern in any orientation.

1, 1, 1, 1, 1, 1, 7, 9, 21, 33, 561, 1063, 16239, 37023, 683049, 1813981, 73918361, 233718771, 15472778911, 58161293145, 6153586919161, 27376781533955, 5115790862761165, 27018006547805491, 8119404508895445151

Offset

1,7

Links

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

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
.0.1.0.0.0.0.1.0
.0.1.1.0.0.1.1.0
.0.1.0.0.0.0.1.0
.1.1.0.0.0.0.1.1
.0.1.0.0.0.0.1.0

Crossrefs

Sequence in context: A243996 A125968 A147068 * A032394 A242988 A063486

Adjacent sequences: A147009 A147010 A147011 * A147013 A147014 A147015

Keyword

nonn

Author

R. H. Hardin, Nov 04 2008

Status

approved