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A146705
Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 1100-1111-0010 pattern in any orientation.
0
1, 1, 1, 1, 1, 21, 47, 269, 1463, 8149, 63091, 761263, 8894963, 159626291, 3010312887, 80637272407
OFFSET
1,6
EXAMPLE
Maximal 8 X 8 example
.0.0.0.0.0.1.1.0
.0.0.0.1.1.1.1.0
.1.1.0.0.1.0.0.0
.1.1.1.1.0.1.0.0
.0.0.1.0.1.1.1.1
.0.0.0.1.0.0.1.1
.0.1.1.1.1.0.0.0
.0.1.1.0.0.0.0.0
CROSSREFS
Sequence in context: A250777 A327302 A156966 * A146713 A140681 A262423
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 04 2008
STATUS
approved