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Search: id:A147190
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A147190 Number of n X n binary arrays symmetric about the diagonal and under 90 degree rotation 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, 1, 1, 1, 3, 3, 7, 7, 15, 15, 41, 41, 163, 163, 697, 697, 3471, 3471, 20005, 20005 (list; graph; listen)
OFFSET

1,13

EXAMPLE

Maximal 13 X 13 example

.0.0.0.1.0.0.0.0.0.1.0.0.0

.0.0.0.1.1.0.0.0.1.1.0.0.0

.0.0.0.0.1.0.0.0.1.0.0.0.0

.1.1.0.0.1.1.0.1.1.0.0.1.1

.0.1.1.1.0.1.0.1.0.1.1.1.0

.0.0.0.1.1.0.0.0.1.1.0.0.0

.0.0.0.0.0.0.0.0.0.0.0.0.0

.0.0.0.1.1.0.0.0.1.1.0.0.0

.0.1.1.1.0.1.0.1.0.1.1.1.0

.1.1.0.0.1.1.0.1.1.0.0.1.1

.0.0.0.0.1.0.0.0.1.0.0.0.0

.0.0.0.1.1.0.0.0.1.1.0.0.0

.0.0.0.1.0.0.0.0.0.1.0.0.0

CROSSREFS

Sequence in context: A147104 A147381 A146035 this_sequence A146450 A147144 A152113

Adjacent sequences: A147187 A147188 A147189 this_sequence A147191 A147192 A147193

KEYWORD

nonn

AUTHOR

Ron Hardin (rhhardin(AT)att.net), Nov 04 2008

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Last modified December 3 22:15 EST 2009. Contains 170310 sequences.


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