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A041827
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Denominators of continued fraction convergents to sqrt(434).
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2
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1, 1, 5, 6, 245, 251, 1249, 1500, 61249, 62749, 312245, 374994, 15312005, 15686999, 78060001, 93747000, 3827940001, 3921687001, 19514688005, 23436375006, 956969688245, 980406063251, 4878593941249, 5859000004500, 239238594121249, 245097594125749
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OFFSET
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0,3
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LINKS
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FORMULA
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G.f.: -(x^2-x-1)*(x^4+6*x^2+1) / (x^8-250*x^4+1). - Colin Barker, Nov 25 2013
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MATHEMATICA
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LinearRecurrence[{0, 0, 0, 250, 0, 0, 0, -1}, {1, 1, 5, 6, 245, 251, 1249, 1500}, 30] (* Harvey P. Dale, Apr 27 2018 *)
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PROG
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(Magma) I:=[1, 1, 5, 6, 245, 251, 1249, 1500]; [n le 8 select I[n] else 250*Self(n-4)-Self(n-8): n in [1..40]]; // Vincenzo Librandi, Dec 25 2013
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CROSSREFS
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KEYWORD
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nonn,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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