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A147093
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Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 1000-1000-1000-1111 pattern in any orientation.
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0
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1, 1, 1, 1, 1, 1, 1, 1, 5, 5, 19, 19, 87, 87, 337, 337, 1993, 1993, 25339, 25339, 376795, 376795, 8378039, 8378039, 203827787, 203827787
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