A146650 Number of n X n binary arrays with all ones connected only in a 1100-0100-1111 pattern in any orientation.

1, 1, 1, 17, 57, 265, 2569, 62981, 1534149, 39874393, 1805421661, 154427138595, 18701005144079

Offset

1,4

Links

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

Example

Maximal 8 X 8 example
.1.1.1.1.0.1.0.1
.0.1.0.0.0.1.1.1
.1.1.0.0.0.0.0.1
.0.0.0.0.0.0.0.1
.0.0.0.0.0.0.0.0
.1.1.1.1.0.1.1.0
.0.1.0.0.0.1.0.0
.1.1.0.1.1.1.1.0

Crossrefs

Sequence in context: A117390 A141841 A146682 * A147131 A147162 A146690

Adjacent sequences: A146647 A146648 A146649 * A146651 A146652 A146653

Keyword

nonn

Author

R. H. Hardin, Nov 04 2008

Status

approved