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A147202
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Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 1100-0101-0111 pattern in any orientation.
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0
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1, 1, 1, 1, 1, 1, 17, 27, 551, 1021, 8573, 22795, 308785, 847643, 66874367, 234921783, 36568568531, 162590981411, 22736801115521, 121607805121155, 25119564285391935
(list; graph; refs; listen; history; internal format)
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