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A041619
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Denominators of continued fraction convergents to sqrt(328).
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2
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1, 9, 325, 2934, 105949, 956475, 34539049, 311807916, 11259624025, 101648424141, 3670602893101, 33137074462050, 1196605283526901, 10802584626204159, 390089651826876625, 3521609451068093784
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OFFSET
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0,2
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LINKS
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FORMULA
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a(n) = 326*a(n-2)-a(n-4).
G.f.: -(x^2-9*x-1)/((x^2-18*x-1)*(x^2+18*x-1)).
(End)
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MATHEMATICA
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Denominator[Convergents[Sqrt[328], 30]] (* Harvey P. Dale, Mar 01 2012 *)
CoefficientList[Series[- (x^2 - 9 x - 1)/((x^2 - 18 x - 1)(x^2 + 18 x - 1)), {x, 0, 30}], x] (* Vincenzo Librandi, Oct 25 2013 *)
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CROSSREFS
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KEYWORD
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nonn,cofr,frac,easy
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AUTHOR
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STATUS
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approved
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