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A146651
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Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 1100-0100-1111 pattern in any orientation.
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0
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1, 1, 1, 1, 1, 1, 19, 27, 575, 1125, 11015, 28077, 425211, 1200943, 68898133, 240563637, 37717682283, 167346267341, 25928895855769, 138290723957205, 29142735143015429
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