The OEIS is supported by the many generous donors to the OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A042327 Denominators of continued fraction convergents to sqrt(690). 2
 1, 3, 4, 11, 15, 56, 2927, 8837, 11764, 32365, 44129, 164752, 8611233, 25998451, 34609684, 95217819, 129827503, 484700328, 25334244559, 76487434005, 101821678564, 280130791133, 381952469697, 1425988200224, 74533338881345, 225026004844259 (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 (0,0,0,0,0,2942,0,0,0,0,0,-1). FORMULA G.f.: -(x^10-3*x^9+4*x^8-11*x^7+15*x^6-56*x^5-15*x^4-11*x^3-4*x^2-3*x-1) / (x^12-2942*x^6+1). - Colin Barker, Dec 07 2013 MAPLE convert(sqrt(690), confrac, 30, cvgts): denom(cvgts); # Wesley Ivan Hurt, Dec 07 2013 MATHEMATICA Denominator/@Convergents[Sqrt[690], 30]  (* Harvey P. Dale, Apr 21 2011 *) CoefficientList[Series[-(x^10 - 3 x^9 + 4 x^8 - 11 x^7 + 15 x^6 - 56 x^5 - 15 x^4 - 11 x^3 - 4 x^2 - 3 x - 1)/(x^12 - 2942 x^6 + 1), {x, 0, 30}], x] (* Vincenzo Librandi, Jan 20 2014 *) CROSSREFS Cf. A042326, A040663. Sequence in context: A002530 A042709 A231067 * A046114 A116654 A041020 Adjacent sequences:  A042324 A042325 A042326 * A042328 A042329 A042330 KEYWORD nonn,frac,easy AUTHOR EXTENSIONS More terms from Colin Barker, Dec 07 2013 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified May 16 20:11 EDT 2022. Contains 353720 sequences. (Running on oeis4.)