A146232 Number of n X n binary arrays with all ones connected only in a 110-111-001 pattern in any orientation.

1, 1, 9, 33, 113, 1393, 59521, 1585365, 62771429, 6390256297, 1169289395909, 252401149719293, 93670173728309347

Offset

1,3

Links

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

Example

Maximal 8 X 8 example
.0.1.1.0.0.1.1.0
.1.1.1.0.0.0.1.1
.1.0.0.1.0.0.1.1
.0.1.1.1.0.1.0.0
.0.1.1.0.0.1.1.1
.1.0.0.1.1.0.1.1
.1.1.1.0.1.1.0.0
.0.1.1.0.1.1.0.0

Crossrefs

Sequence in context: A147261 A197359 A147155 * A146180 A221447 A147147

Adjacent sequences: A146229 A146230 A146231 * A146233 A146234 A146235

Keyword

nonn

Author

R. H. Hardin

Status

approved