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A147052
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Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 0100-1101-0111 pattern in any orientation.
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0
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1, 1, 1, 1, 1, 1, 17, 21, 509, 957, 9009, 23635, 500815, 1453635, 110991021, 410901579, 51936051799, 236370303513, 42297696189623, 235560923543349, 80009496099425831, 544930757644765859
(list; graph; refs; listen; history; internal format)
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