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A147327
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Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 00100-00100-11111-00100 pattern in any orientation.
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0
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1, 1, 1, 1, 1, 1, 1, 1, 6, 1, 28, 9, 150, 25, 1118, 57, 7823, 349, 97756, 3222, 1845246, 35623, 42655192, 520596, 1288627017, 9629183
(list; graph; refs; listen; history; internal format)
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