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A146792
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Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 0110-0100-1111 pattern in any orientation.
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0
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1, 1, 1, 1, 1, 1, 17, 29, 597, 1129, 8865, 24301, 252485, 677761, 72037073, 260058405, 50790437661, 228224469561, 29783355194457, 163753391774397, 29294065583268725, 187282551074891489
(list; graph; refs; listen; history; internal format)
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