A146872 Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 1110-0100-0111 pattern in any orientation.

1, 1, 1, 1, 1, 1, 17, 29, 597, 1065, 7937, 22829, 200213, 509041, 58873393, 209855541, 45265003821, 200942562233, 23496039620441, 129320692683437, 19050505005054181, 117997121583703345

Offset

1,7

Links

Table of n, a(n) for n=1..22.

Example

Maximal 8 X 8 example
.1.0.0.0.0.0.0.1
.1.0.1.0.0.1.0.1
.1.1.1.0.0.1.1.1
.0.0.1.0.0.1.0.0
.1.0.0.0.0.0.0.1
.1.0.1.0.0.1.0.1
.1.1.1.0.0.1.1.1
.0.0.1.0.0.1.0.0

Crossrefs

Sequence in context: A103304 A104067 A274023 * A146792 A124884 A052006

Adjacent sequences: A146869 A146870 A146871 * A146873 A146874 A146875

Keyword

nonn

Author

R. H. Hardin, Nov 04 2008

Status

approved