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 A010734 Constant sequence: the all 9's sequence. 10
 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,1 COMMENTS The digital root of 9^n gives the sequence 1, 9, 9, 9, 9, ... - Cino Hilliard, Dec 31 2004 Continued fraction expansion of (9 + sqrt(85))/2. - Bruno Berselli, Mar 15 2011 Also decimal expansion of 0.9999... = 1. - Jianing Song, Jul 12 2018 Contains "SUB[48]: 200 Terabytes of nines", proposed in Randall Munroe's xkcd Web Comic #2016 as a subsequence. - Hugo Pfoertner, Jul 15 2018 LINKS Tanya Khovanova, Recursive Sequences INRIA Algorithms Project, Encyclopedia of Combinatorial Structures 1017 Randall Munroe, OEIS Submissions, xkcd Web Comic #2016, Jul 06 2018. Anderson Norton, Michael Baldwin, Does 0.999... really equal 1?, The Math Educ. 21 (2) (2012) 58-67. Index entries for linear recurrences with constant coefficients, signature (1). FORMULA G.f.: 9/(1-x). - Bruno Berselli, Mar 15 2011 Equals A158289(n) + A199264(n). - Arkadiusz Wesolowski, Nov 30 2011 E.g.f.: 9*e^x. - Vincenzo Librandi, Jan 26 2012 MATHEMATICA Table[9, {81}] (* Arkadiusz Wesolowski, Nov 30 2011 *) IntegerDigits[10^100 - 1] (* Alonso del Arte, Jul 09 2018 *) PROG (PARI) a(n)=9 \\ Charles R Greathouse IV, Oct 07 2015 (Scala) List.fill(100)(9) // Alonso del Arte, Jul 08 2018 CROSSREFS Sequence in context: A099646 A181693 A271880 * A180599 A291092 A066568 Adjacent sequences:  A010731 A010732 A010733 * A010735 A010736 A010737 KEYWORD nonn,easy AUTHOR STATUS approved

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Last modified August 20 01:14 EDT 2019. Contains 326136 sequences. (Running on oeis4.)