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A146191
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Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 101-111-100 pattern in any orientation.
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0
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1, 1, 1, 1, 3, 13, 31, 85, 561, 4911, 35269, 314409, 4382215, 80159625, 1612619787, 40395227173, 1368159254461, 58890622637327, 3064461664498081, 200721016168368683, 16988612946006051893, 1814141923819418631539
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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
.0.0.1.0.1.0.0.0
.0.0.1.1.1.0.0.0
.1.1.0.0.1.0.0.0
.0.1.0.0.0.1.0.1
.1.1.1.0.0.1.1.1
.0.0.0.1.1.0.0.1
.0.0.0.0.1.0.0.0
.0.0.0.1.1.1.0.0
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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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