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A162056
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Number of nXn symmetric binary arrays with rows, considered as graycode numbers, in nondecreasing order
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1
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2, 6, 18, 100, 794, 11268, 264083, 11030649, 813916625, 108554870990, 26200578482080, 11534899965771737, 9306038519940583539, 13836478621233487213306, 38099883187974152891055420
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