OFFSET
0,2
COMMENTS
Decimal expansion of 41/1110. - Enrique Pérez Herrero, Nov 13 2021
LINKS
FORMULA
a(n+1) = 3*A010882(n). - Reinhard Zumkeller, Oct 25 2010
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
KEYWORD
nonn,base,easy
AUTHOR
Odimar Fabeny, Sep 10 2010
EXTENSIONS
Edited by N. J. A. Sloane, Sep 23 2010
STATUS
approved