A146666 Number of n X n binary arrays with all ones connected only in a 1100-0111-0110 pattern in any orientation.

1, 1, 1, 17, 49, 253, 3643, 105629, 2607651, 96901053, 7295653475, 891089127445, 144757991075787

Offset

1,4

Links

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

Example

Maximal 8 X 8 example
.0.0.1.0.0.0.0.0
.1.1.1.0.0.0.1.0
.1.1.0.0.0.0.1.1
.0.1.0.0.0.1.1.1
.0.0.0.0.0.1.0.0
.0.1.1.0.0.0.1.1
.1.1.1.0.1.1.1.0
.0.0.1.1.0.1.1.0

Crossrefs

Sequence in context: A147217 A147051 A146855 * A146730 A146862 A146586

Adjacent sequences: A146663 A146664 A146665 * A146667 A146668 A146669

Keyword

nonn

Author

R. H. Hardin, Nov 04 2008

Status

approved