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A147361 Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 01110-11111 pattern in any orientation. 0
1, 1, 1, 1, 15, 5, 62, 17, 510, 89, 27004, 5555, 1402086, 252517, 161324581, 16208566, 45647676851, 3528341313, 18214143607973, 1173259124198, 14342537261685270, 702406050500183 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,5

LINKS

Table of n, a(n) for n=1..22.

EXAMPLE

Maximal 8 X 8 example

.0.0.0.0.0.0.0.0

.0.0.0.0.0.0.0.0

.0.0.0.0.0.0.0.0

.0.0.1.0.0.1.0.0

.0.1.1.0.0.1.1.0

.0.1.1.0.0.1.1.0

.0.1.1.0.0.1.1.0

.0.0.1.0.0.1.0.0

CROSSREFS

Sequence in context: A040215 A147422 A147084 * A147224 A147060 A110791

Adjacent sequences:  A147358 A147359 A147360 * A147362 A147363 A147364

KEYWORD

nonn

AUTHOR

R. H. Hardin

STATUS

approved

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Last modified April 25 13:31 EDT 2019. Contains 322461 sequences. (Running on oeis4.)