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A146693
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Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 1100-1100-0111 pattern in any orientation.
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0
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1, 1, 1, 1, 3, 9, 23, 49, 265, 1763, 11689, 76179, 790941, 10968467, 170749547, 2982674505, 69135368821, 2071835100571, 74394376040387, 3179634632557555
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OFFSET
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1,5
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LINKS
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EXAMPLE
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Maximal 8 X 8 example
.0.0.0.0.1.1.1.0
.0.0.0.1.1.0.0.0
.0.0.0.1.1.0.0.0
.0.1.1.0.0.1.1.0
.1.1.1.0.0.1.1.1
.1.0.0.1.1.0.0.1
.1.0.0.1.1.0.0.1
.0.0.0.0.1.1.1.0
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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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