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 A042201 Denominators of continued fraction convergents to sqrt(626). 2
 1, 50, 2501, 125100, 6257501, 313000150, 15656265001, 783126250200, 39171968775001, 1959381565000250, 98008250218787501, 4902371892504375300, 245216602875437552501, 12265732515664382000350, 613531842386094537570001, 30688857851820391260500400 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,2 LINKS Vincenzo Librandi, Table of n, a(n) for n = 0..200 Tanya Khovanova, Recursive Sequences Index entries for linear recurrences with constant coefficients, signature (50, 1). FORMULA a(n) = F(n, 50), the n-th Fibonacci polynomial evaluated at x=50. - T. D. Noe, Jan 19 2006 From Philippe Deléham, Nov 23 2008: (Start) a(n) = 50*a(n-1) + a(n-2) for n > 1, a(0)=1, a(1)=50. G.f.: 1/(1 - 50*x - x^2). (End) MATHEMATICA Denominator[Convergents[Sqrt[626], 30]] (* Vincenzo Librandi, Jan 16 2014 *) CROSSREFS Cf. A042200, A040600. Sequence in context: A223871 A223796 A165800 * A097838 A203842 A251058 Adjacent sequences:  A042198 A042199 A042200 * A042202 A042203 A042204 KEYWORD nonn,frac,easy AUTHOR EXTENSIONS Additional term from Colin Barker, Dec 04 2013 STATUS approved

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Last modified April 20 06:31 EDT 2021. Contains 343121 sequences. (Running on oeis4.)