A146690 Number of n X n binary arrays with all ones connected only in a 1100-1100-0111 pattern in any orientation.

1, 1, 1, 17, 57, 337, 3641, 94309, 2415539, 84963203, 5127056685, 535357644345, 78543418275739

Offset

1,4

Links

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

Example

Maximal 8 X 8 example
.0.1.1.1.0.1.1.0
.1.1.0.0.0.1.1.1
.1.1.0.0.0.0.0.1
.0.0.0.0.0.0.0.1
.0.0.0.0.0.1.1.0
.0.0.1.1.0.1.1.1
.0.0.1.1.0.0.0.1
.0.0.0.1.1.1.0.1

Crossrefs

Sequence in context: A146650 A147131 A147162 * A146437 A146783 A146570

Adjacent sequences: A146687 A146688 A146689 * A146691 A146692 A146693

Keyword

nonn

Author

R. H. Hardin, Nov 04 2008

Status

approved