A147185 Number of n X n binary arrays with all ones connected only in a 11000-01110-00011 pattern in any orientation.

1, 1, 1, 1, 13, 61, 329, 2787, 39701, 747265, 18941331, 668354617, 33772020165

Offset

1,5

Links

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

Example

Maximal 8 X 8 example
.1.1.0.0.0.0.0.1
.0.1.1.1.0.0.1.1
.0.0.0.1.1.0.1.0
.1.0.0.0.0.1.1.0
.1.1.0.0.0.1.0.0
.0.1.0.1.1.0.0.0
.0.1.1.0.1.1.1.0
.0.0.1.0.0.0.1.1

Crossrefs

Sequence in context: A231800 A141725 A279762 * A122885 A257216 A135535

Adjacent sequences: A147182 A147183 A147184 * A147186 A147187 A147188

Keyword

nonn

Author

R. H. Hardin, Nov 04 2008

Status

approved