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A048540 Smallest oblong (promic) number containing exactly n 5's. 10
56, 552, 5550, 5055752, 5255556, 552555542, 2555555256, 551555015556, 5555555065506, 515605555595550, 5558455555057550, 495553555055055552, 555055556595557556, 15975555555558555452, 5525459555405553555552, 59555925551555575555056, 255555555455525595515520 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
Eric Weisstein's World of Mathematics, Pronic Number
CROSSREFS
Sequence in context: A220930 A220209 A276565 * A189497 A219712 A244429
KEYWORD
nonn,base
AUTHOR
Patrick De Geest, May 15 1999
EXTENSIONS
a(14)-a(17) from Giovanni Resta, Oct 09 2019
STATUS
approved

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Last modified February 23 08:04 EST 2024. Contains 370269 sequences. (Running on oeis4.)