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A048548
Smallest oblong (promic) number containing exactly n 9's.
10
90, 992, 792990, 4992990, 199699292, 919999892, 29939899992, 939969999920, 99179499990990, 999690999669990, 129990929999959950, 299899968999993990, 10999489909979999990, 299929969229995999992, 12999999959999499709890, 126994909999399899999990, 9399899999156999909995992
OFFSET
1,1
LINKS
Eric Weisstein's World of Mathematics, Pronic Number
KEYWORD
nonn,base
AUTHOR
Patrick De Geest, May 15 1999
EXTENSIONS
a(13)-a(17) from Giovanni Resta, Oct 09 2019
STATUS
approved