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A042768
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Numerators of continued fraction convergents to sqrt(915).
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2
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30, 121, 7290, 29281, 1764150, 7085881, 426917010, 1714753921, 103312152270, 414963363001, 25001113932330, 100419419092321, 6050166259471590, 24301084456978681, 1464115233678192450, 5880762019169748481, 354309836383863101310, 1423120107554622153721
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OFFSET
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0,1
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LINKS
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FORMULA
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MATHEMATICA
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Numerator[Convergents[Sqrt[915], 30]] (* or *) CoefficientList[Series[(30 + 121 x + 30 x^2 - x^3)/(1 - 242 x^2 + x^4), {x, 0, 30}], x] (* Vincenzo Librandi, Dec 04 2013 *)
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PROG
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(Magma) I:=[30, 121, 7290, 29281]; [n le 4 select I[n] else 242*Self(n-2)-Self(n-4): n in [1..30]]; // Vincenzo Librandi, Dec 04 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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EXTENSIONS
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STATUS
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approved
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