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A147415
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Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 1001-1111-0110 pattern in any orientation.
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0
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1, 1, 1, 1, 1, 1, 1, 6, 9, 32, 25, 194, 81, 1875, 559, 19586
(list; graph; refs; listen; history; internal format)
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