A147085 - OEIS

A147085

Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 10001-11111 pattern in any orientation.

1, 1, 1, 1, 5, 1, 9, 1, 17, 1, 197, 25, 1045, 149, 7998, 825, 200321, 9523, 3209727, 104723, 72875134, 1495123, 3146115855, 45808775, 136864094359, 1584020605

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

OFFSET

1,5

LINKS

Table of n, a(n) for n=1..26.

EXAMPLE

Maximal 9 X 9 example

.0.0.1.0.0.0.1.0.0

.0.0.1.1.1.1.1.0.0

.1.1.0.0.0.0.0.1.1

.0.1.0.0.0.0.0.1.0

.1.1.0.0.0.0.0.1.1

.0.0.1.1.1.1.1.0.0

.0.0.1.0.0.0.1.0.0

CROSSREFS

Sequence in context: A266072 A376018 A147423 * A348980 A046580 A050358

Adjacent sequences: A147082 A147083 A147084 * A147086 A147087 A147088

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 04 2008

STATUS

approved