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A147361
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Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 01110-11111 pattern in any orientation.
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0
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1, 1, 1, 1, 15, 5, 62, 17, 510, 89, 27004, 5555, 1402086, 252517, 161324581, 16208566, 45647676851, 3528341313, 18214143607973, 1173259124198, 14342537261685270, 702406050500183
(list; graph; refs; listen; history; internal format)
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