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A042661 Denominators of continued fraction convergents to sqrt(860). 2
1, 3, 43, 132, 7699, 23229, 332905, 1021944, 59605657, 179838915, 2577350467, 7911890316, 461466988795, 1392312856701, 19953846982609, 61253853804528, 3572677367645233, 10779285956740227, 154482680762008411, 474227328242765460 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 0..200

Index entries for linear recurrences with constant coefficients, signature (0,0,0,7742,0,0,0,-1).

FORMULA

G.f.: -(x^2-3*x-1)*(x^4+44*x^2+1) / ((x^4-88*x^2+1)*(x^4+88*x^2+1)). - Colin Barker, Dec 20 2013

MATHEMATICA

Denominator[Convergents[Sqrt[860], 30]] (* Vincenzo Librandi, Jan 26 2014 *)

CROSSREFS

Cf. A042660, A040829.

Sequence in context: A127930 A062647 A003525 * A281503 A030990 A306970

Adjacent sequences:  A042658 A042659 A042660 * A042662 A042663 A042664

KEYWORD

nonn,frac,easy

AUTHOR

N. J. A. Sloane.

EXTENSIONS

More terms from Colin Barker, Dec 20 2013

STATUS

approved

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Last modified May 20 03:10 EDT 2019. Contains 323412 sequences. (Running on oeis4.)