A147068 Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 10000-11111-00001 pattern in any orientation.

1, 1, 1, 1, 1, 1, 7, 9, 21, 27, 607, 1167, 17769, 40363, 559713, 1434237, 48361407, 146868985, 7834524479, 27923748641, 1943918391505, 8015840240133, 1237965320138777, 6025367765747539

Offset

1,7

Links

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

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
.1.1.0.0.0.0.1.1
.0.1.0.0.0.0.1.0
.0.1.0.0.0.0.1.0
.0.1.0.0.0.0.1.0
.0.1.1.0.0.1.1.0

Crossrefs

Sequence in context: A139202 A243996 A125968 * A147012 A032394 A242988

Adjacent sequences: A147065 A147066 A147067 * A147069 A147070 A147071

Keyword

nonn

Author

R. H. Hardin, Nov 04 2008

Status

approved