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A147462
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Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 1100-1111-0011 pattern in any orientation.
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0
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1, 1, 1, 1, 1, 1, 1, 1, 9, 9, 25, 25, 93, 93, 589, 589, 6735, 6735, 107293, 107293, 1848191, 1848191, 45715541, 45715541, 1702371353, 1702371353
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OFFSET
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1,9
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LINKS
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EXAMPLE
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Maximal 9 X 9 example
.0.0.1.1.0.1.1.0.0
.0.0.1.1.0.1.1.0.0
.0.1.1.0.0.0.1.1.0
.0.1.1.0.0.0.1.1.0
.0.0.0.0.0.0.0.0.0
.0.1.1.0.0.0.1.1.0
.0.1.1.0.0.0.1.1.0
.0.0.1.1.0.1.1.0.0
.0.0.1.1.0.1.1.0.0
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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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