A147239 Number of n X n binary arrays with all ones connected only in a 1101-0111-0010 pattern in any orientation.

1, 1, 1, 17, 57, 413, 5775, 129385, 3828429, 165279073, 11795547693, 1337774439785

Offset

1,4

Links

Table of n, a(n) for n=1..12.

Example

Maximal 8 X 8 example
.1.0.0.1.0.1.1.0
.1.1.0.1.1.1.0.0
.0.1.1.0.1.0.1.0
.1.1.0.0.0.1.1.1
.0.0.0.0.1.1.0.1
.1.1.0.1.0.0.1.0
.0.1.1.1.0.1.1.1
.0.0.1.0.1.1.0.1

Crossrefs

Sequence in context: A146783 A146570 A147209 * A264473 A146578 A146453

Adjacent sequences: A147236 A147237 A147238 * A147240 A147241 A147242

Keyword

nonn

Author

R. H. Hardin, Nov 04 2008

Status

approved