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A147113
Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 1000-1000-1111-0010 pattern in any orientation.
0
1, 1, 1, 1, 1, 1, 1, 5, 23, 49, 83, 217, 723, 2201, 7571, 32315, 154081, 841887, 4456709, 26183699, 165757037
OFFSET
1,8
EXAMPLE
Maximal 8 X 8 example
.0.0.1.0.1.1.1.0
.1.1.1.1.0.0.1.0
.1.0.0.0.0.0.1.1
.1.0.0.0.0.0.1.0
.0.1.0.0.0.0.0.1
.1.1.0.0.0.0.0.1
.0.1.0.0.1.1.1.1
.0.1.1.1.0.1.0.0
CROSSREFS
Sequence in context: A057622 A055626 A127200 * A135771 A327409 A140811
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 04 2008
STATUS
approved