OFFSET
0,1
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 0..200
Index entries for linear recurrences with constant coefficients, signature (0,22,0,-1).
FORMULA
G.f.: (5+11*x+5*x^2-x^3)/(1-22*x^2+x^4). - Colin Barker, Jan 02 2012
a(n) = 22*a(n-2) - a(n-4). - Wesley Ivan Hurt, Jun 16 2023
MATHEMATICA
Table[Numerator[FromContinuedFraction[ContinuedFraction[Sqrt[30], n]]], {n, 1, 50}] (* Vladimir Joseph Stephan Orlovsky, Mar 18 2011 *)
Numerator[Convergents[Sqrt[30], 30]] (* Harvey P. Dale, May 06 2012 *)
CROSSREFS
KEYWORD
nonn,cofr,frac,easy
AUTHOR
EXTENSIONS
More terms from Harvey P. Dale, Apr 04 2013
STATUS
approved