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A132644 X-values of solutions to the equation X*(X + 1) - 13*Y^2 = 0. 1
0, 324, 421200, 546717924, 709639444800, 921111452633124, 1195601955878350800, 1551890417618646705924, 2014352566467047545939200, 2614628079383810095982376324, 3393785232687619037537578530000 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,2
LINKS
FORMULA
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
MATHEMATICA
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 *)
CROSSREFS
Cf. A007654.
Sequence in context: A298101 A209044 A209016 * A202635 A013763 A013887
KEYWORD
nonn,easy
AUTHOR
Mohamed Bouhamida, Nov 14 2007
EXTENSIONS
More terms from Paolo P. Lava, Oct 07 2008
STATUS
approved

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Last modified March 28 05:39 EDT 2024. Contains 371235 sequences. (Running on oeis4.)