OFFSET
0,3
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, 0, 0, 0, 0, 117240, 0, 0, 0, 0, 0, 0, 0, 0, 0, -1).
FORMULA
G.f.: -(x^18 -x^17 +10*x^16 -21*x^15 +31*x^14 -52*x^13 +83*x^12 -218*x^11 +2045*x^10 -2263*x^9 -2045*x^8 -218*x^7 -83*x^6 -52*x^5 -31*x^4 -21*x^3 -10*x^2 -x -1) / (x^20 -117240*x^10 +1). - Colin Barker, Dec 07 2013
MATHEMATICA
Denominator[Convergents[Sqrt[671], 30]] (* Vincenzo Librandi, Jan 19 2014 *)
LinearRecurrence[{0, 0, 0, 0, 0, 0, 0, 0, 0, 117240, 0, 0, 0, 0, 0, 0, 0, 0, 0, -1}, {1, 1, 10, 21, 31, 52, 83, 218, 2045, 2263, 115195, 117458, 1172317, 2462092, 3634409, 6096501, 9730910, 25558321, 239755799, 265314120}, 30] (* Harvey P. Dale, May 31 2023 *)
CROSSREFS
KEYWORD
nonn,frac,easy
AUTHOR
EXTENSIONS
More terms from Colin Barker, Dec 07 2013
STATUS
approved