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A147154
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Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 1000-1100-0111-0010 pattern in any orientation.
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0
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1, 1, 1, 1, 1, 9, 33, 125, 685, 3853, 28603, 231163, 2799935, 41066873, 767865147, 16399923305
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OFFSET
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1,6
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LINKS
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EXAMPLE
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Maximal 8 X 8 example
.0.0.1.1.0.0.1.0
.0.1.1.0.0.0.1.1
.1.1.0.0.0.1.1.0
.0.1.0.0.1.1.0.0
.0.0.1.1.0.0.1.0
.0.1.1.0.0.0.1.1
.1.1.0.0.0.1.1.0
.0.1.0.0.1.1.0.0
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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