OFFSET
0,1
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 0..200
Index entries for linear recurrences with constant coefficients, signature (0,326,0,-1).
FORMULA
a(n) = 326*a(n-2)-a(n-4). G.f.: -(x^3-18*x^2-163*x-18)/((x^2-18*x-1)*(x^2+18*x-1)). [Colin Barker, Jul 16 2012]
MATHEMATICA
CoefficientList[Series[- (x^3 - 18 x^2 - 163 x - 18)/((x^2 - 18 x - 1) (x^2 + 18 x - 1)), {x, 0, 30}], x] (* Vincenzo Librandi, Oct 27 2013 *)
LinearRecurrence[{0, 326, 0, -1}, {18, 163, 5886, 53137}, 20] (* Harvey P. Dale, Aug 21 2020 *)
CROSSREFS
KEYWORD
nonn,cofr,frac,easy
AUTHOR
STATUS
approved