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A147204
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Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 1100-0101-0111 pattern in any orientation.
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0
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1, 1, 1, 1, 1, 5, 17, 37, 97, 589, 4299, 27851, 193127, 2080835, 29286959, 452848509, 7844143081, 177658806371, 5163186936815, 177926288939305
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