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Search: id:A162115
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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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1
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| 2, 4, 9, 56, 499, 8000, 207554, 9186901, 646499724, 67812031124, 9964922040226, 1948175255901120
(list; graph; listen)
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