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A146579
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Number of n X n binary arrays symmetric under horizontal reflection 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, 1, 1, 19, 35, 679, 1365, 22713, 61459, 2460007, 8324377, 1000960863, 4362315603, 920463675841, 5070018879619, 1889649557770845, 13120916750335663, 10628808830660687857, 93523395817222374455
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