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A147378 Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 10000-11100-00111-00001 pattern in any orientation. 0
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 9, 9, 29, 29, 109, 109, 573, 573, 4463, 4463, 53751, 53751, 903115, 903115, 18601177 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,11

LINKS

Table of n, a(n) for n=1..25.

EXAMPLE

Maximal 11 X 11 example

.0.0.0.1.1.0.1.1.0.0.0

.0.0.0.1.0.0.0.1.0.0.0

.0.0.1.1.0.0.0.1.1.0.0

.0.0.1.0.0.0.0.0.1.0.0

.0.1.1.0.0.0.0.0.1.1.0

.0.0.0.0.0.0.0.0.0.0.0

.0.1.1.0.0.0.0.0.1.1.0

.0.0.1.0.0.0.0.0.1.0.0

.0.0.1.1.0.0.0.1.1.0.0

.0.0.0.1.0.0.0.1.0.0.0

.0.0.0.1.1.0.1.1.0.0.0

CROSSREFS

Sequence in context: A111005 A076089 A046000 * A146604 A294691 A147172

Adjacent sequences:  A147375 A147376 A147377 * A147379 A147380 A147381

KEYWORD

nonn

AUTHOR

R. H. Hardin

STATUS

approved

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Last modified August 19 16:39 EDT 2022. Contains 356229 sequences. (Running on oeis4.)