OFFSET
0,1
LINKS
Ivan Panchenko, Table of n, a(n) for n = 0..1000
Tanya Khovanova, Recursive Sequences
Index entries for linear recurrences with constant coefficients, signature (1, 1).
FORMULA
G.f.: (2+13*x)/(1-x-x^2). - Philippe Deléham, Nov 19 2008
a(n) = a(n-1) + a(n-2). - Wesley Ivan Hurt, Oct 01 2021
MATHEMATICA
a={}; b=2; c=15; AppendTo[a, b]; AppendTo[a, c]; Do[b=b+c; AppendTo[a, b]; c=b+c; AppendTo[a, c], {n, 1, 40, 1}]; a (* Vladimir Joseph Stephan Orlovsky, Jul 23 2008 *)
Transpose[NestList[{#[[2]], #[[1]]+#[[2]]}&, {2, 15}, 40]][[1]] (* Harvey P. Dale, Dec 16 2010 *)
CoefficientList[Series[(2 + 13 x)/(1 - x - x^2), {x, 0, 40}], x] (* Wesley Ivan Hurt, Jun 15 2014 *)
LinearRecurrence[{1, 1}, {2, 15}, 40] (* Harvey P. Dale, Sep 22 2024 *)
CROSSREFS
KEYWORD
nonn,easy,changed
AUTHOR
N. J. A. Sloane, Jun 14 1998
EXTENSIONS
More terms from Wesley Ivan Hurt, Jun 15 2014
STATUS
approved