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A146857
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Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 1101-0111-0100 pattern in any orientation.
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0
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1, 1, 1, 1, 1, 1, 1, 1, 17, 17, 49, 49, 249, 249, 3481, 3481, 80333, 80333, 1943801, 1943801, 59816323, 59816323
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