A147346 - OEIS

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A147346

Number of n X n binary arrays with all ones connected only in a 01010-11111-00100 pattern in any orientation.

1, 1, 1, 1, 13, 49, 229, 1867, 20463, 291821, 6315721, 181852653, 7128512813, 395610811947

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

OFFSET

1,5

LINKS

Table of n, a(n) for n=1..14.

EXAMPLE

Maximal 8 X 8 example

.0.1.0.1.0.0.1.0

.1.1.1.1.1.0.1.1

.0.0.1.0.0.1.1.0

.0.1.0.0.0.0.1.1

.1.1.0.0.0.0.1.0

.0.1.1.0.0.1.0.0

.1.1.0.1.1.1.1.1

.0.1.0.0.1.0.1.0

CROSSREFS

Sequence in context: A319086 A146287 A289999 * A147452 A146782 A373578

Adjacent sequences: A147343 A147344 A147345 * A147347 A147348 A147349

KEYWORD

nonn

AUTHOR

R. H. Hardin

STATUS

approved