A147208 - OEIS

A147208

Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 1100-0101-0111 pattern in any orientation.

1, 1, 1, 1, 1, 13, 45, 213, 1089, 4693, 30575, 258653, 2683865, 36188311, 599719485

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

OFFSET

1,6

LINKS

EXAMPLE

Maximal 8 X 8 example

.0.0.0.0.1.1.1.0

.1.1.0.0.1.0.1.0

.1.0.0.0.0.0.1.1

.1.1.1.0.0.1.0.0

.0.0.1.0.0.1.1.1

.1.1.0.0.0.0.0.1

.0.1.0.1.0.0.1.1

.0.1.1.1.0.0.0.0

CROSSREFS

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 04 2008

STATUS

approved