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 A042187 Denominators of continued fraction convergents to sqrt(618). 2
 1, 1, 7, 57, 349, 406, 19837, 20243, 141295, 1150603, 7044913, 8195516, 400429681, 408625197, 2852180863, 23226072101, 142208613469, 165434685570, 8083073520829, 8248508206399, 57574122759223, 468841490280183, 2870623064440321, 3339464554720504 (list; graph; refs; listen; history; text; internal format)
 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, 20186, 0, 0, 0, 0, 0, -1). FORMULA G.f.: -(x^10 - x^9 + 7*x^8 - 57*x^7 + 349*x^6 - 406*x^5 - 349*x^4 - 57*x^3 - 7*x^2 - x - 1) / (x^12 - 20186*x^6 + 1). - Colin Barker, Dec 03 2013 MATHEMATICA Denominator[Convergents[Sqrt[618], 30]] (* Vincenzo Librandi, Jan 16 2014 *) CROSSREFS Cf. A042186, A040593. Sequence in context: A180817 A201438 A202510 * A201872 A218587 A218838 Adjacent sequences: A042184 A042185 A042186 * A042188 A042189 A042190 KEYWORD nonn,frac,easy AUTHOR EXTENSIONS More terms from Colin Barker, Dec 03 2013 STATUS approved

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Last modified March 27 05:46 EDT 2023. Contains 361554 sequences. (Running on oeis4.)