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A147218
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Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 1100-0111-0101 pattern in any orientation.
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0
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1, 1, 1, 1, 1, 1, 17, 27, 575, 1091, 10073, 26275, 436817, 1241759, 99221321, 359430255, 57329770665, 261948614931, 43007975306403, 238557155162155, 61726897724737383
(list; graph; refs; listen; history; internal format)
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