A147452 Number of n X n binary arrays with all ones connected only in a 11000-01111-11000 pattern in any orientation.

1, 1, 1, 1, 13, 49, 233, 1439, 14021, 187331, 3462054, 81074523, 2503802404

Offset

1,5

Links

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

Example

Maximal 8 X 8 example
.0.1.0.1.1.0.0.0
.0.1.0.0.1.1.1.1
.0.1.0.1.1.0.0.0
.1.1.1.0.0.1.0.1
.1.0.1.0.0.1.1.1
.0.0.0.1.1.0.1.0
.1.1.1.1.0.0.1.0
.0.0.0.1.1.0.1.0

Crossrefs

Sequence in context: A146287 A289999 A147346 * A146782 A373578 A320469

Adjacent sequences: A147449 A147450 A147451 * A147453 A147454 A147455

Keyword

nonn

Author

R. H. Hardin

Status

approved