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A041778
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Numerators of continued fraction convergents to sqrt(410).
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2
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20, 81, 3260, 13121, 528100, 2125521, 85548940, 344321281, 13858400180, 55777922001, 2244975280220, 9035679042881, 363672136995460, 1463724227024721, 58912641217984300, 237114289098961921
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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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a(n) = 162*a(n-2)-a(n-4). G.f.: -(x^3-20*x^2-81*x-20)/(x^4-162*x^2+1). - Colin Barker, Jul 16 2012
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MATHEMATICA
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LinearRecurrence[{0, 162, 0, -1}, {20, 81, 3260, 13121}, 30] (* Harvey P. Dale, Jul 19 2015 *)
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CROSSREFS
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KEYWORD
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nonn,cofr,easy,less
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AUTHOR
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STATUS
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approved
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