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A147187 Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 11000-01110-00011 pattern in any orientation. 0
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 13, 13, 61, 61, 329, 329, 2787, 2787, 39701, 39701, 747265, 747265, 18941331, 18941331, 668354617, 668354617 (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

.0.0.0.0.0.0.0.0.0.0.0

.0.0.0.0.0.0.0.0.0.0.0

.0.0.0.1.1.0.1.1.0.0.0

.0.1.1.1.0.0.0.1.1.1.0

.1.1.0.0.0.0.0.0.0.1.1

.0.0.0.0.0.0.0.0.0.0.0

.1.1.0.0.0.0.0.0.0.1.1

.0.1.1.1.0.0.0.1.1.1.0

.0.0.0.1.1.0.1.1.0.0.0

.0.0.0.0.0.0.0.0.0.0.0

.0.0.0.0.0.0.0.0.0.0.0

CROSSREFS

Sequence in context: A321654 A302513 A147013 * A147069 A303312 A146471

Adjacent sequences:  A147184 A147185 A147186 * A147188 A147189 A147190

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 04 2008

STATUS

approved

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Last modified May 18 16:24 EDT 2022. Contains 353816 sequences. (Running on oeis4.)