OFFSET
1,1
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 1..300
Index entries for linear recurrences with constant coefficients, signature (11,-10).
FORMULA
From Elmo R. Oliveira, Jun 12 2025: (Start)
G.f.: 5*x*(20*x+7)/((x-1)*(10*x-1)).
E.g.f.: 5*(2 - 3*exp(x) + exp(10*x)).
a(n) = 5*A173833(n).
a(n) = 11*a(n-1) - 10*a(n-2) for n > 2. (End)
MATHEMATICA
Table[5*(10^n-3), {n, 20}]; (* Alonso del Arte, Nov 15 2010 *)
LinearRecurrence[{11, -10}, {35, 485}, 20] (* Harvey P. Dale, Aug 20 2023 *)
PROG
(Magma) [5*(10^n-3): n in [1..35]];
(PARI) a(n)=5*10^n-15 \\ Charles R Greathouse IV, Jun 04 2011
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
STATUS
approved