OFFSET
0,1
LINKS
Tanya Khovanova, Recursive Sequences
Index entries for linear recurrences with constant coefficients, signature (1,1).
FORMULA
G.f.: (3+8*x)/(1-x-x^2). - Philippe Deléham, Nov 19 2008
a(n) = 8*Fibonacci(n) + 3*Fibonacci(n+1). - Lechoslaw Ratajczak, Mar 14 2020
a(n) = a(n-1) + a(n-2). - Wesley Ivan Hurt, Jun 17 2021
MATHEMATICA
a={}; b=3; c=11; AppendTo[a, b]; AppendTo[a, c]; Do[b=b+c; AppendTo[a, b]; c=b+c; AppendTo[a, c], {n, 4!}]; a (* Vladimir Joseph Stephan Orlovsky, Sep 17 2008 *)
LinearRecurrence[{1, 1}, {3, 11}, 40] (* Harvey P. Dale, Jan 27 2012 *)
PROG
(Magma) [8*Fibonacci(n) + 3*Fibonacci(n+1): n in [0..40]]; // Vincenzo Librandi, Mar 17 2020
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
STATUS
approved