A147178 Number of n X n binary arrays with all ones connected only in a 1000-1111-0101 pattern in any orientation.

1, 1, 1, 17, 53, 329, 3195, 60697, 1822001, 62512113, 3196151109, 269695770307, 35398633644551

Offset

1,4

Links

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

Example

Maximal 8 X 8 example
.0.1.0.1.0.0.0.0
.1.1.1.1.0.0.0.0
.1.0.0.0.0.0.0.0
.0.1.1.0.0.0.0.0
.1.1.0.1.1.0.1.1
.0.1.0.1.0.0.1.0
.1.1.0.1.1.0.1.1
.0.0.1.1.0.1.1.0

Crossrefs

Sequence in context: A147255 A146737 A146839 * A146642 A146610 A146847

Adjacent sequences: A147175 A147176 A147177 * A147179 A147180 A147181

Keyword

nonn

Author

R. H. Hardin, Nov 04 2008

Status

approved