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A041065
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Denominators of continued fraction convergents to sqrt(39).
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2
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1, 4, 49, 200, 2449, 9996, 122401, 499600, 6117601, 24970004, 305757649, 1248000600, 15281764849, 62375059996, 763782484801, 3117504999200, 38173842475201, 155812874900004, 1907928341275249, 7787526240001000, 95358243221287249, 389220499125149996
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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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G.f.: -(x^2-4*x-1) / (x^4-50*x^2+1). - Colin Barker, Nov 12 2013
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MATHEMATICA
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PROG
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(Magma) I:=[1, 4, 49, 200]; [n le 4 select I[n] else 50*Self(n-2)-Self(n-4): n in [1..30]]; // Vincenzo Librandi, Dec 10 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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