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A162094
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Number of nXn symmetric binary arrays with rows, considered as binary numbers, in strictly increasing order, and no more than 4 ones in any row
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0
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2, 3, 9, 48, 397, 4046, 50562, 725875, 11870670, 219522591, 4530707851, 103448006539, 2595528068368, 71042542549939
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