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A147383 Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 10000-11100-00111-00001 pattern in any orientation. 0
1, 1, 1, 1, 1, 5, 9, 25, 47, 195, 767, 3745, 18201, 111311, 686767, 6208537, 52616577 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,6

LINKS

Table of n, a(n) for n=1..17.

EXAMPLE

Maximal 8 X 8 example

.0.0.0.0.0.0.1.1

.0.0.0.0.0.0.1.0

.0.0.0.0.0.1.1.0

.0.0.1.1.0.1.0.0

.0.0.1.0.1.1.0.0

.0.1.1.0.0.0.0.0

.0.1.0.0.0.0.0.0

.1.1.0.0.0.0.0.0

CROSSREFS

Sequence in context: A284285 A025624 A147496 * A276918 A127976 A147286

Adjacent sequences:  A147380 A147381 A147382 * A147384 A147385 A147386

KEYWORD

nonn

AUTHOR

R. H. Hardin

STATUS

approved

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Last modified August 9 05:53 EDT 2022. Contains 356016 sequences. (Running on oeis4.)