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A146246 Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 110-111-010 pattern in any orientation. 0
1, 1, 1, 1, 1, 1, 11, 21, 35, 67, 259, 945, 3949, 14269, 69629, 358835, 2304465, 14395141, 109376391, 851675891, 8461569139, 84383219157, 1033770596811, 12613520889815, 192843929142189, 2993789320611135 (list; graph; refs; listen; history; internal format)
OFFSET

1,7

EXAMPLE

Maximal 8 X 8 example

.0.0.0.0.1.0.0.0

.0.0.0.1.1.1.0.0

.0.1.0.1.1.0.0.0

.1.1.1.0.0.1.1.0

.0.1.1.0.0.1.1.1

.0.0.0.1.1.0.1.0

.0.0.1.1.1.0.0.0

.0.0.0.1.0.0.0.0

CROSSREFS

Sequence in context: A109335 A086982 A145060 * A064832 A129638 A127624

Adjacent sequences:  A146243 A146244 A146245 * A146247 A146248 A146249

KEYWORD

nonn

AUTHOR

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

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Last modified February 16 21:30 EST 2012. Contains 205971 sequences.