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A146684
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Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 1100-1000-1111 pattern in any orientation.
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0
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1, 1, 1, 1, 1, 1, 1, 1, 17, 17, 57, 57, 265, 265, 2569, 2569, 53981, 53981, 1294213, 1294213, 32947589
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