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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)
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OFFSET
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0,1
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COMMENTS
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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
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LINKS
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Table of n, a(n) for n=0..80.
Tanya Khovanova, Recursive Sequences
INRIA Algorithms Project, Encyclopedia of Combinatorial Structures 1017
A. Norton, Michael Baldwin, Does 0.999... really equal 1?, The Math Educ. 21 (2) (2012) 58-67.
Index to divisibility sequences
Index entries for linear recurrences with constant coefficients, signature (1).
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FORMULA
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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
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MATHEMATICA
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Table[9, {81}] (* Arkadiusz Wesolowski, Nov 30 2011 *)
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PROG
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(PARI) a(n)=9 \\ Charles R Greathouse IV, Oct 07 2015
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CROSSREFS
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Sequence in context: A099646 A181693 A271880 * A180599 A291092 A066568
Adjacent sequences: A010731 A010732 A010733 * A010735 A010736 A010737
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KEYWORD
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nonn,easy
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AUTHOR
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N. J. A. Sloane.
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STATUS
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approved
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