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A146716
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Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 1100-1111-1000 pattern in any orientation.
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0
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1, 1, 1, 1, 1, 1, 1, 1, 17, 17, 53, 53, 349, 349, 4017, 4017, 76237, 76237, 2269673, 2269673, 85654393, 85654393
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