A147498 - OEIS

A147498

Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 1110-0110-0111 pattern in any orientation.

1, 1, 1, 1, 1, 1, 9, 13, 169, 289, 1635, 3769, 26681, 58223, 2298509, 6525751

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

OFFSET

1,7

LINKS

EXAMPLE

Maximal 8 X 8 example

.1.0.0.0.0.0.0.1

.1.1.1.0.0.1.1.1

.0.0.1.0.0.1.0.0

.1.0.0.0.0.0.0.1

.1.1.1.0.0.1.1.1

.0.0.1.0.0.1.0.0

CROSSREFS

KEYWORD

nonn

AUTHOR

STATUS

approved