OFFSET
0,1
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 0..200
Index entries for linear recurrences with constant coefficients, signature (11,-10).
FORMULA
a(n) = 3*A097166(n).
a(n) = 10*a(n-1) + 9, n > 0.
a(n) = 11*a(n-1) - 10*a(n-2), n > 1.
G.f.: 3*(1 + 2*x)/(1 - 11*x + 10*x^2). - Vincenzo Librandi, Jan 03 2013
E.g.f.: exp(x)*(4*exp(9*x) - 1). - Elmo R. Oliveira, Sep 10 2024
MATHEMATICA
CoefficientList[Series[3*(1 + 2*x)/(1 - 11*x + 10*x^2), {x, 0, 30}], x] (* Vincenzo Librandi, Jan 03 2013 *)
PROG
(Magma) [4*10^n-1 : n in [0..20]];
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Vincenzo Librandi, Nov 01 2011
STATUS
approved