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A042895
Denominators of continued fraction convergents to sqrt(979).
2
1, 3, 7, 38, 45, 218, 263, 1533, 3329, 11520, 717569, 2164227, 5046023, 27394342, 32440365, 157155802, 189596167, 1105136637, 2399869441, 8304744960, 517294056961, 1560186915843, 3637667888647, 19748526359078, 23386194247725, 113293303349978, 136679497597703
OFFSET
0,2
LINKS
Index entries for linear recurrences with constant coefficients, signature (0, 0, 0, 0, 0, 0, 0, 0, 0, 720898, 0, 0, 0, 0, 0, 0, 0, 0, 0, -1).
FORMULA
G.f.: -(x^18 - 3*x^17 + 7*x^16 - 38*x^15 + 45*x^14 - 218*x^13 + 263*x^12 - 1533*x^11 + 3329*x^10 - 11520*x^9 - 3329*x^8 - 1533*x^7 - 263*x^6 - 218*x^5 - 45*x^4 - 38*x^3 - 7*x^2 - 3*x - 1) / (x^20 - 720898*x^10 + 1). - Colin Barker, Dec 25 2013
a(n) = 720898*a(n-10) - a(n-20) for n > 19. - Vincenzo Librandi, Feb 01 2014
MATHEMATICA
Denominator[Convergents[Sqrt[979], 30]] (* Vincenzo Librandi, Feb 01 2014 *)
CROSSREFS
Sequence in context: A174734 A152560 A162926 * A173561 A258840 A209029
KEYWORD
nonn,frac,easy
EXTENSIONS
More terms from Colin Barker, Dec 25 2013
STATUS
approved