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A147385
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Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 10001-11111-00100 pattern in any orientation.
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0
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1, 1, 1, 1, 7, 1, 25, 9, 112, 27, 3654, 849, 113270, 25721, 4179283
(list; graph; refs; listen; history; internal format)
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