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A048548
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Smallest pronic number containing exactly n 9's.
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1
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90, 992, 792990, 4992990, 199699292, 919999892, 29939899992, 939969999920, 99179499990990, 999690999669990, 129990929999959950, 299899968999993990
(list; graph; refs; listen; history; internal format)
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