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A147096
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Number of n X n binary arrays symmetric about the diagonal and under 90 degree rotation with all ones connected only in a 1000-1000-1000-1111 pattern in any orientation.
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0
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1, 1, 1, 1, 1, 1, 1, 1, 3, 3, 7, 7, 15, 15, 31, 31, 73, 73, 307, 307, 1451, 1451, 6775, 6775, 33773, 33773, 192865
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