A147326 - OEIS

A147326

Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 00100-00100-11111-00100 pattern in any orientation.

1, 1, 1, 1, 5, 1, 9, 1, 54, 15, 1010, 305, 26482, 3993, 1090248, 85931, 79078189, 4847983, 11622838412, 605747926, 3166762458310, 124132744693, 1523768055043582, 41573048881668

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

OFFSET

1,5

LINKS

Table of n, a(n) for n=1..24.

EXAMPLE

Maximal 9 X 9 example

.0.0.0.0.1.0.0.0.0

.0.0.1.1.1.1.1.0.0

.0.1.0.0.1.0.0.1.0

.1.1.1.1.0.1.1.1.1

.0.1.0.0.1.0.0.1.0