OFFSET
0,1
COMMENTS
Alternate terms form a Lucas sequence.
Specifically, a(2n) = A022113(n). - Jonathan Vos Post, Nov 16 2005
LINKS
Eric Weisstein's World of Mathematics, Lucas Sequence.
Index entries for linear recurrences with constant coefficients, signature (0,1,0,1).
FORMULA
a(n) = a(n-2) + a(n-4). G.f.: (3*x^3-5*x^2-5*x-2) / (x^4+x^2-1). - Colin Barker, Oct 18 2013
MATHEMATICA
CoefficientList[Series[(3*x^3 - 5*x^2 - 5*x - 2)/(x^4 + x^2 - 1), {x, 0, 50}], x] (* Wesley Ivan Hurt, Jan 21 2017 *)
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Gary W. Adamson, Jun 06 2004
EXTENSIONS
Edited by Don Reble, Nov 15 2005
Missing terms inserted and more terms added by Colin Barker, Oct 18 2013
STATUS
approved