OFFSET
0,1
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 0..200
Index entries for linear recurrences with constant coefficients, signature (0,146,0,-1).
FORMULA
G.f.: (24 + 73*x + 24*x^2 - x^3)/(x^4 - 146*x^2 + 1). - Vincenzo Librandi, Nov 17 2013
a(n) = 146*a(n-2) - a(n-4). - Vincenzo Librandi, Nov 17 2013
MATHEMATICA
Numerator[Convergents[Sqrt[592], 30]] (* Vincenzo Librandi, Nov 17 2013 *)
(* Alternative: *)
CoefficientList[Series[(24 + 73 x + 24 x^2 - x^3)/(x^4 - 146 x^2 + 1), {x, 0, 30}], x] (* Vincenzo Librandi, Nov 17 2013 *)
PROG
(Magma) I:=[24, 73, 3528, 10657]; [n le 4 select I[n] else 146*Self(n-2)-Self(n-4): n in [1..25]]; // Vincenzo Librandi, Nov 17 2013
CROSSREFS
KEYWORD
nonn,cofr,frac,easy,less
AUTHOR
STATUS
approved