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A162115
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Number of nXn symmetric binary arrays with rows, considered as graycode numbers, in strictly increasing order, and no more than 7 ones in any row or column
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0
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2, 4, 9, 56, 499, 8000, 207554, 9186901, 646499724, 67812031124, 9964922040226, 1948175255901120
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