OFFSET
0,2
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 0..200
Index entries for linear recurrences with constant coefficients, signature (0,0,0,0,0,1924,0,0,0,0,0,-1).
FORMULA
a(n) = 1924*a(n-6)-a(n-12). G.f.: -(x^10-2*x^9+3*x^8-29*x^7+32*x^6 -93*x^5 -32*x^4-29*x^3-3*x^2-2*x-1) / (x^12-1924*x^6+1). - Colin Barker, Jul 19 2012
MATHEMATICA
Denominator[Convergents[Sqrt[107], 30]] (* or *) LinearRecurrence[ {0, 0, 0, 0, 0, 1924, 0, 0, 0, 0, 0, -1}, {1, 2, 3, 29, 32, 93, 1892, 3877, 5769, 55798, 61567, 178932}, 30] (* Harvey P. Dale, Aug 30 2013 *)
CoefficientList[Series[- (x^10 - 2 x^9 + 3 x^8 - 29 x^7 + 32 x^6 - 93 x^5 - 32 x^4 - 29 x^3 - 3 x^2 - 2 x - 1)/(x^12 - 1924 x^6 + 1), {x, 0, 30}], x] (* Vincenzo Librandi, Oct 24 2013 *)
CROSSREFS
KEYWORD
nonn,frac,easy
AUTHOR
STATUS
approved