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 A063564 Smallest k such that 3^k has exactly n 9's in its decimal representation. 1
 1, 2, 10, 30, 35, 36, 49, 83, 102, 121, 111, 179, 174, 203, 176, 153, 200, 234, 270, 277, 258, 220, 380, 278, 374, 323, 459, 445, 417, 507, 528, 467, 602, 535, 609, 605, 570, 571, 582, 599, 600, 620, 768, 702, 771, 724, 719, 733, 797, 870, 872 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,2 LINKS Harry J. Smith, Table of n, a(n) for n = 0..150 MATHEMATICA a = {}; Do[k = 1; While[ Count[ IntegerDigits[3^k], 9] != n, k++ ]; a = Append[a, k], {n, 0, 50} ]; a PROG (PARI) a(n)={my(k=1); while(n<>#select(d->d==9, digits(3^k)), k++); k} \\ Harry J. Smith, Aug 26 2009, Andrew Howroyd, Jun 28 2018 CROSSREFS Sequence in context: A215954 A098425 A098408 * A076440 A047198 A290461 Adjacent sequences:  A063561 A063562 A063563 * A063565 A063566 A063567 KEYWORD base,nonn AUTHOR Robert G. Wilson v, Aug 10 2001 EXTENSIONS Name corrected by Jon E. Schoenfield, Jun 26 2018 STATUS approved

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Last modified September 29 03:42 EDT 2020. Contains 337420 sequences. (Running on oeis4.)