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 A042387 Denominators of continued fraction convergents to sqrt(720). 2
 1, 1, 5, 6, 317, 323, 1609, 1932, 102073, 104005, 518093, 622098, 32867189, 33489287, 166824337, 200313624, 10583132785, 10783446409, 53716918421, 64500364830, 3407735889581, 3472236254411, 17296680907225 (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 (0,0,0,322,0,0,0,-1). FORMULA G.f.: -(x^2-x-1)*(x^4+6*x^2+1)/((x^2-4*x-1)*(x^2+4*x-1)*(x^4+18*x^2+1)). [Colin Barker, Aug 09 2012] MATHEMATICA Denominator[Convergents[Sqrt[720], 30]] (* Vincenzo Librandi, Oct 25 2013 *) CROSSREFS Cf. A042386. Sequence in context: A041827 A042089 A156191 * A007666 A064177 A042721 Adjacent sequences: A042384 A042385 A042386 * A042388 A042389 A042390 KEYWORD nonn,cofr,frac,easy AUTHOR N. J. A. Sloane. STATUS approved

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Last modified June 4 23:50 EDT 2023. Contains 363130 sequences. (Running on oeis4.)