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 A041154 Numerators of continued fraction convergents to sqrt(87). 2
 9, 28, 513, 1567, 28719, 87724, 1607751, 4910977, 90005337, 274926988, 5038691121, 15391000351, 282076697439, 861621092668, 15791256365463, 48235390189057, 884028279768489, 2700320229494524, 49489792410669921 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,1 LINKS Vincenzo Librandi, Table of n, a(n) for n = 0..100 Index entries for linear recurrences with constant coefficients, signature (0,56,0,-1). FORMULA G.f.: (9 + 28*x + 9*x^2 - x^3) / (1 - 56*x^2 + x^4). [Bruno Berselli, Oct 29 2013] a(n) = 56*a(n-2) - a(n-4). [Bruno Berselli, Oct 29 2013] MATHEMATICA Numerator[Convergents[Sqrt[87], 30]] (* Vincenzo Librandi, Oct 29 2013 *) CROSSREFS Cf. A010538, A041155. Sequence in context: A271185 A306843 A277511 * A024121 A205144 A258483 Adjacent sequences: A041151 A041152 A041153 * A041155 A041156 A041157 KEYWORD nonn,cofr,frac,easy AUTHOR STATUS approved

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Last modified March 22 17:23 EDT 2023. Contains 361432 sequences. (Running on oeis4.)