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A147016 Number of n X n binary arrays symmetric about the diagonal and under 90 degree rotation 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, 1, 1, 1, 1, 5, 5, 13, 13, 31, 31, 111, 111, 377, 377, 1545, 1545, 10231, 10231 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,15

LINKS

Table of n, a(n) for n=1..28.

EXAMPLE

Maximal 15 X 15 example

.0.0.0.0.0.1.0.0.0.1.0.0.0.0.0

.0.0.0.0.0.1.1.0.1.1.0.0.0.0.0

.0.0.0.0.0.1.0.0.0.1.0.0.0.0.0

.0.0.0.0.1.1.0.0.0.1.1.0.0.0.0

.0.0.0.1.0.1.0.0.0.1.0.1.0.0.0

.1.1.1.1.1.0.0.0.0.0.1.1.1.1.1

.0.1.0.0.0.0.0.0.0.0.0.0.0.1.0

.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0

.0.1.0.0.0.0.0.0.0.0.0.0.0.1.0

.1.1.1.1.1.0.0.0.0.0.1.1.1.1.1

.0.0.0.1.0.1.0.0.0.1.0.1.0.0.0

.0.0.0.0.1.1.0.0.0.1.1.0.0.0.0

.0.0.0.0.0.1.0.0.0.1.0.0.0.0.0

.0.0.0.0.0.1.1.0.1.1.0.0.0.0.0

.0.0.0.0.0.1.0.0.0.1.0.0.0.0.0

CROSSREFS

Sequence in context: A168392 A147280 A147494 * A146370 A164927 A094904

Adjacent sequences:  A147013 A147014 A147015 * A147017 A147018 A147019

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 04 2008

STATUS

approved

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Last modified June 16 14:56 EDT 2019. Contains 324152 sequences. (Running on oeis4.)