A147147 Number of n X n binary arrays with all ones connected only in a 1000-1100-0111-0010 pattern in any orientation.

1, 1, 1, 9, 33, 121, 1109, 21917, 638145, 19928333, 1044135195, 95057962687, 13578889854579

Offset

1,4

Links

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

Example

Maximal 8 X 8 example
.0.0.1.0.1.1.0.0
.0.1.1.1.0.1.1.0
.1.1.0.0.0.0.1.1
.1.0.0.0.0.0.1.0
.0.1.0.0.0.0.0.1
.1.1.0.0.0.0.1.1
.0.1.1.0.1.1.1.0
.0.0.1.1.0.1.0.0

Crossrefs

Sequence in context: A146232 A146180 A221447 * A147154 A257284 A257744

Adjacent sequences: A147144 A147145 A147146 * A147148 A147149 A147150

Keyword

nonn

Author

R. H. Hardin, Nov 04 2008

Status

approved