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A146396
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Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 1000-1100-0111 pattern in any orientation.
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0
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1, 1, 1, 1, 9, 21, 85, 433, 2775, 20277, 189267, 2151189, 36658025, 657296273, 17789206817
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