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A146793
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Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 0110-0100-1111 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, 129, 129, 2513, 2513, 72929, 72929, 1541697, 1541697, 32044977, 32044977
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