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 A180593 Digital root of 3n. 6
 0, 3, 6, 9, 3, 6, 9, 3, 6, 9, 3, 6, 9, 3, 6, 9, 3, 6, 9, 3, 6, 9, 3, 6, 9, 3, 6, 9, 3, 6, 9, 3, 6, 9, 3, 6, 9, 3, 6, 9, 3, 6, 9, 3, 6, 9, 3, 6, 9, 3, 6, 9, 3, 6, 9, 3, 6, 9, 3, 6, 9, 3, 6, 9, 3, 6, 9, 3, 6, 9, 3, 6, 9, 3, 6, 9, 3, 6, 9, 3, 6, 9, 3, 6, 9, 3, 6 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,2 COMMENTS a(n+1) = 3*A010882(n). [From Reinhard Zumkeller, Oct 25 2010] LINKS Index entries for linear recurrences with constant coefficients, signature (0, 0, 1). FORMULA G.f.: (-3*(1 + 2*x + 3*x^2))/(-1 + x^3) for n>0. - Alexander R. Povolotsky, Jun 13 2012 MATHEMATICA digitalRoot[n_Integer?Positive] := FixedPoint[Plus@@IntegerDigits[#]&, n]; Table[If[n==0, 0, digitalRoot[3*n]], {n, 0, 200}] (* Vladimir Joseph Stephan Orlovsky, May 02 2011 *) LinearRecurrence[{0, 0, 1}, {0, 3, 6, 9}, 120] (* Harvey P. Dale, Sep 03 2020 *) CROSSREFS Cf. A180592, A180594, A180595, A180596, A180597, A180598, A180599. [From Robert G. Wilson v, Sep 20 2010] Sequence in context: A099679 A013663 A245223 * A271742 A195771 A086276 Adjacent sequences:  A180590 A180591 A180592 * A180594 A180595 A180596 KEYWORD nonn,base AUTHOR Odimar Fabeny, Sep 10 2010 EXTENSIONS Edited by N. J. A. Sloane, Sep 23 2010 STATUS approved

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Last modified April 11 10:11 EDT 2021. Contains 342886 sequences. (Running on oeis4.)