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A132644
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X-values of solutions to the equation X*(X + 1) - 13*Y^2 = 0.
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1
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0, 324, 421200, 546717924, 709639444800, 921111452633124, 1195601955878350800, 1551890417618646705924, 2014352566467047545939200, 2614628079383810095982376324, 3393785232687619037537578530000
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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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a(n) = 1298*a(n-1) - a(n-2) + 648; a(0)=0, a(1)=324.
G.f.: -324*x*(x+1)/((x-1)*(x^2 - 1298*x + 1)). - Colin Barker, Oct 25 2012
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MATHEMATICA
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CoefficientList[Series[-((324 x (1+x))/(-1+1299 x-1299 x^2+x^3)), {x, 0, 20}], x] (* or *) LinearRecurrence[{1299, -1299, 1}, {0, 324, 421200}, 20] (* Harvey P. Dale, Jul 24 2021 *)
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CROSSREFS
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KEYWORD
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nonn,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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