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A146685
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Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 1100-1000-1111 pattern in any orientation.
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0
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1, 1, 1, 1, 3, 7, 19, 43, 167, 933, 5533, 35651, 275619, 2803985, 35280241, 511587387, 8841277573, 187861018789, 4919632132323, 154644209783001
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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
.0.0.0.1.1.1.1.0
.0.0.0.1.0.0.0.0
.0.0.0.1.1.0.0.0
.1.1.1.0.0.1.1.1
.1.0.1.0.0.1.0.1
.1.0.0.1.1.0.0.1
.1.0.0.1.0.0.0.1
.0.0.0.1.1.1.1.0
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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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