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A147488
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Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 11011-01110-00100 pattern in any orientation.
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0
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1, 1, 1, 1, 1, 5, 20, 49, 167, 643, 3053, 16577, 118904, 896633, 8867027, 91561000, 1224859380, 17454229913
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