A147437 - OEIS

A147437

Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 1010-1111-1010 pattern in any orientation.

1, 1, 1, 1, 5, 1, 19, 11, 496, 277, 13622, 3725, 625566, 100329, 46290886, 7689337

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

OFFSET

1,5

LINKS

EXAMPLE

Maximal 8 X 8 example

.0.0.0.0.0.0.0.0

.0.1.0.0.0.0.1.0

.1.1.1.0.0.1.1.1

.0.1.0.0.0.0.1.0

.1.1.1.0.0.1.1.1

CROSSREFS

KEYWORD

nonn

AUTHOR

STATUS

approved