A147156 - OEIS

A147156

Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 1000-1100-0111-0100 pattern in any orientation.

1, 1, 1, 1, 1, 1, 1, 1, 211, 393, 3687, 9027, 129263

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,9

LINKS

EXAMPLE

Maximal 9 X 9 example

.0.0.1.0.0.0.1.0.0

.1.1.1.0.0.0.1.1.1

.0.0.1.1.0.1.1.0.0

.0.0.0.1.0.1.0.0.0

.0.0.0.0.0.0.0.0.0

.0.0.0.1.0.1.0.0.0

.0.0.1.1.0.1.1.0.0

.1.1.1.0.0.0.1.1.1

.0.0.1.0.0.0.1.0.0

CROSSREFS

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 04 2008

STATUS

approved