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A147013 Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 01000-11111-00010 pattern in any orientation. 0
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 13, 13, 57, 57, 273, 273, 2363, 2363, 27689, 27689, 439785, 439785, 10940975, 10940975, 360992565, 360992565 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,11

LINKS

Table of n, a(n) for n=1..26.

EXAMPLE

Maximal 11 X 11 example

.0.0.0.1.0.0.0.1.0.0.0

.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

.0.0.0.1.0.0.0.1.0.0.0

.0.0.0.0.0.0.0.0.0.0.0

.0.0.0.1.0.0.0.1.0.0.0

.0.0.1.1.0.0.0.1.1.0.0

.0.0.0.1.0.0.0.1.0.0.0

.0.0.0.1.1.0.1.1.0.0.0

.0.0.0.1.0.0.0.1.0.0.0

CROSSREFS

Sequence in context: A147249 A321654 A302513 * A147187 A147069 A303312

Adjacent sequences:  A147010 A147011 A147012 * A147014 A147015 A147016

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 04 2008

STATUS

approved

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Last modified October 5 10:54 EDT 2022. Contains 357255 sequences. (Running on oeis4.)