OFFSET
0,1
LINKS
Harvey P. Dale, 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.: (3+12x)/(1-x-x^2). - Philippe Deléham, Nov 19 2008
MATHEMATICA
a={}; b=3; c=15; 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 18 2008 *)
LinearRecurrence[{1, 1}, {3, 15}, 40] (* Harvey P. Dale, May 27 2012 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
STATUS
approved