A147107 Number of n X n binary arrays with all ones connected only in a 1000-1000-1111-0010 pattern in any orientation.

1, 1, 1, 9, 33, 105, 733, 10341, 272153, 6151437, 211017885, 12082565577, 1120607764115

Offset

1,4

Links

Table of n, a(n) for n=1..13.

Example

Maximal 8 X 8 example
.0.0.1.0.1.1.1.0
.1.1.1.1.0.0.1.0
.1.0.0.0.0.0.1.1
.1.0.0.0.0.0.1.0
.0.1.0.0.0.0.0.1
.1.1.0.0.0.0.0.1
.0.1.0.0.1.1.1.1
.0.1.1.1.0.1.0.0

Crossrefs

Sequence in context: A036543 A147269 A147123 * A147115 A147261 A197359

Adjacent sequences: A147104 A147105 A147106 * A147108 A147109 A147110

Keyword

nonn

Author

R. H. Hardin, Nov 04 2008

Status

approved