A146578 Number of n X n binary arrays with all ones connected only in a 0100-1100-0111 pattern in any orientation.

1, 1, 1, 17, 57, 457, 7575, 206575, 7284891, 429058537, 43146239725, 6893658124929, 1724211995309777

Offset

1,4

Links

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

Example

Maximal 8 X 8 example
.0.1.0.1.1.1.0.0
.1.1.1.0.0.1.1.0
.1.0.0.0.0.1.0.0
.1.0.0.0.0.0.1.0
.0.1.0.0.0.1.1.1
.1.1.1.0.1.0.0.1
.1.0.0.0.1.1.0.1
.1.0.1.1.1.0.0.0

Crossrefs

Sequence in context: A147209 A147239 A264473 * A146453 A146046 A048508

Adjacent sequences: A146575 A146576 A146577 * A146579 A146580 A146581

Keyword

nonn

Author

R. H. Hardin, Nov 04 2008

Status

approved