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A041607
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Denominators of continued fraction convergents to sqrt(321).
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2
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1, 1, 11, 12, 419, 431, 4729, 5160, 180169, 185329, 2033459, 2218788, 77472251, 79691039, 874382641, 954073680, 33312887761, 34266961441, 375982502171, 410249463612, 14324464264979, 14734713728591, 161671601550889, 176406315279480, 6159486321053209
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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+12*x^2+1) / (x^8-430*x^4+1). - Colin Barker, Nov 19 2013
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MATHEMATICA
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LinearRecurrence[{0, 0, 0, 430, 0, 0, 0, -1}, {1, 1, 11, 12, 419, 431, 4729, 5160}, 30] (* Harvey P. Dale, Dec 24 2015 *)
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PROG
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(Magma) I:=[1, 1, 11, 12, 419, 431, 4729, 5160]; [n le 8 select I[n] else 430*Self(n-4)-Self(n-8): n in [1..40]]; // Vincenzo Librandi, Dec 21 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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