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A146585
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Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 0100-1100-0111 pattern in any orientation.
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0
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1, 1, 1, 1, 5, 21, 83, 423, 2315, 16901, 170185, 2128101, 35334761, 707503833, 18370140687, 587431855321
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