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A147041
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Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 0100-0100-1111-0100 pattern in any orientation.
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0
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1, 1, 1, 1, 1, 1, 1, 3, 15, 27, 43, 77, 211, 651, 2217, 7655, 29663
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