A146413 Number of n X n binary arrays with all ones connected only in a 1000-1111-1000 pattern in any orientation.

1, 1, 1, 9, 29, 137, 1117, 13601, 257342, 6436423, 229848194, 12134224575, 927491358387

Offset

1,4

Links

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

Example

Maximal 8 X 8 example
.1.1.1.0.1.1.1.0
.0.1.0.1.0.1.0.0
.0.1.0.1.0.1.0.0
.0.1.0.1.0.1.0.0
.0.0.1.1.1.0.1.0
.1.0.0.0.0.0.1.0
.1.1.1.1.0.0.1.0
.1.0.0.0.0.1.1.1

Crossrefs

Sequence in context: A056258 A147282 A146602 * A146054 A321588 A173262

Adjacent sequences: A146410 A146411 A146412 * A146414 A146415 A146416

Keyword

nonn

Author

R. H. Hardin

Status

approved