A147003 Number of n X n binary arrays with all ones connected only in a 00100-11111-00100 pattern in any orientation.

1, 1, 1, 1, 7, 21, 77, 479, 3600, 33995, 482862, 8547925, 199841936, 6379998757, 265761442757, 14715360146745

Offset

1,5

Links

Table of n, a(n) for n=1..16.

Example

Maximal 8 X 8 example
.0.0.1.0.0.0.1.0
.1.1.1.1.1.0.1.0
.0.0.1.0.0.1.1.1
.0.1.0.0.0.0.1.0
.0.1.0.0.0.0.1.0
.1.1.1.0.0.1.0.0
.0.1.0.1.1.1.1.1
.0.1.0.0.0.1.0.0

Crossrefs

Sequence in context: A153497 A146247 A241431 * A110683 A092785 A114902

Adjacent sequences: A147000 A147001 A147002 * A147004 A147005 A147006

Keyword

nonn

Author

R. H. Hardin, Nov 04 2008

Status

approved