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Search: id:A162121
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| A162121 |
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Number of nXn binary arrays with rows and columns, considered as graycode numbers, in strictly increasing order, and no more than 4 ones in any row or column |
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1
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| 2, 4, 25, 408, 15142, 1005975, 101107992, 14314188384, 2728248222006
(list; graph; listen)
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