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A147453 Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 11000-01111-11000 pattern in any orientation. 0
1, 1, 1, 1, 3, 1, 15, 9, 105, 33, 2514, 927, 80722, 22331, 4773446, 785549, 420563686, 56689127, 72421134415, 8452376637, 24510814953678, 2212845668155 (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

.1.0.1.0.0.1.0.1

.1.1.1.0.0.1.1.1

.0.1.0.0.0.0.1.0

.0.1.0.0.0.0.1.0

.0.1.0.0.0.0.1.0

CROSSREFS

Sequence in context: A134144 A035342 A039815 * A147020 A134685 A130757

Adjacent sequences:  A147450 A147451 A147452 * A147454 A147455 A147456

KEYWORD

nonn

AUTHOR

R. H. Hardin

STATUS

approved

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Last modified October 1 23:55 EDT 2014. Contains 247527 sequences.