OFFSET
0,2
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 0..200
Index entries for linear recurrences with constant coefficients, signature (0,0,214,0,0,1).
FORMULA
G.f.: -(x^4 -2*x^3 +5*x^2 +2*x +1) / (x^6 +214*x^3 -1). - Colin Barker, Nov 26 2013
a(n) = 214*a(n-3) + a(n-6) for n>5. - Vincenzo Librandi, Dec 26 2013
MATHEMATICA
Denominator[Convergents[Sqrt[458], 30]] (* Vincenzo Librandi, Dec 26 2013 *)
PROG
(Magma) I:=[1, 2, 5, 212, 429, 1070]; [n le 6 select I[n] else 214*Self(n-3)+Self(n-6): n in [1..40]]; // Vincenzo Librandi, Dec 26 2013
CROSSREFS
KEYWORD
nonn,frac,easy
AUTHOR
EXTENSIONS
More terms from Colin Barker, Nov 26 2013
STATUS
approved