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A146672
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Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 1100-0111-0110 pattern in any orientation.
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0
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1, 1, 1, 1, 1, 1, 3, 19, 43, 71, 159, 607, 2057, 8951, 43111, 227107, 1266527, 7483327, 50232185, 389882233, 3353662007
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