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A147132
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Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 1000-1001-1111 pattern in any orientation.
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0
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1, 1, 1, 1, 1, 1, 17, 21, 513, 983, 10393, 25501, 371965, 1045185, 45350635, 151885957, 15301404559, 63656571009, 10185822253393, 51223616106841, 10431158742897567
(list; graph; refs; listen; history; internal format)
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