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A147510 Number of n X n binary arrays symmetric about the diagonal and under 90 degree rotation with all ones connected only in a 11110-01111 pattern in any orientation. 0
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 3, 3, 9, 9, 23, 23, 81, 81, 267, 267, 1053, 1053, 6173, 6173 (list; graph; refs; listen; history; internal format)
OFFSET

1,13

EXAMPLE

Maximal 13 X 13 example

.0.0.0.0.1.0.0.0.1.0.0.0.0

.0.0.0.0.1.1.0.1.1.0.0.0.0

.0.0.0.0.1.1.0.1.1.0.0.0.0

.0.0.0.0.1.1.0.1.1.0.0.0.0

.1.1.1.1.0.1.0.1.0.1.1.1.1

.0.1.1.1.1.0.0.0.1.1.1.1.0

.0.0.0.0.0.0.0.0.0.0.0.0.0

.0.1.1.1.1.0.0.0.1.1.1.1.0

.1.1.1.1.0.1.0.1.0.1.1.1.1

.0.0.0.0.1.1.0.1.1.0.0.0.0

.0.0.0.0.1.1.0.1.1.0.0.0.0

.0.0.0.0.1.1.0.1.1.0.0.0.0

.0.0.0.0.1.0.0.0.1.0.0.0.0

CROSSREFS

Sequence in context: A146820 A146663 A146394 * A146474 A145957 A128019

Adjacent sequences:  A147507 A147508 A147509 * A147511 A147512 A147513

KEYWORD

nonn

AUTHOR

R. H. Hardin (rhhardin(AT)att.net)

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Last modified February 17 14:43 EST 2012. Contains 206044 sequences.