A146855 Number of n X n binary arrays with all ones connected only in a 1101-0111-0100 pattern in any orientation.

1, 1, 1, 17, 49, 249, 3481, 80333, 1943801, 59816323, 3493732595, 338685091013, 44460911929907

Offset

1,4

Links

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

Example

Maximal 8 X 8 example
.0.0.1.0.1.1.0.0
.0.0.1.1.1.0.1.1
.0.0.0.0.1.0.1.0
.0.0.0.0.0.1.1.1
.0.0.0.0.0.0.0.1
.1.1.0.1.0.1.0.0
.0.1.1.1.0.1.1.1
.0.1.0.0.1.1.0.1

Crossrefs

Sequence in context: A146775 A147217 A147051 * A146666 A146730 A146862

Adjacent sequences: A146852 A146853 A146854 * A146856 A146857 A146858

Keyword

nonn

Author

R. H. Hardin, Nov 04 2008

Status

approved