A147036 - OEIS

A147036

Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 0100-0100-1111-0100 pattern in any orientation.

1, 1, 1, 1, 1, 1, 1, 1, 57, 101, 643, 1213, 11025, 24069, 404103, 1045647, 63992333, 202749207, 15427634943, 58155611415, 5752715311031, 25613170526609, 4354577724343601, 22986304172716415, 7655445641728562265

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

OFFSET

1,9

LINKS

Table of n, a(n) for n=1..25.

EXAMPLE

Maximal 9 X 9 example

.0.1.0.0.0.0.0.1.0

.1.1.1.1.0.1.1.1.1

.0.1.0.0.0.0.0.1.0

.0.0.0.0.0.0.0.0.0

.0.1.0.0.0.0.0.1.0

.1.1.1.1.0.1.1.1.1

.0.1.0.0.0.0.0.1.0

CROSSREFS

Sequence in context: A145554 A111320 A147468 * A147044 A366206 A237663

Adjacent sequences: A147033 A147034 A147035 * A147037 A147038 A147039

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 04 2008

STATUS

approved