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A174780 y-values in the solution to x^2-43*y^2=1. 2
0, 531, 3697884, 25752063645, 179337367525896, 1248905401698276099, 8697377038089427227540, 60568532444349369514312461, 421799251245071971208244750864, 2937409925102148763144846930704435, 20456122296612112741468742817180934476 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

The corresponding values of x of this Pell equation are in  A174753.

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 1..200

Index entries for linear recurrences with constant coefficients, signature (6964,-1).

FORMULA

a(n) = 6964*a(n-1)-a(n-2) with a(1)=0, a(2)=531.

G.f.: 531*x^2/(1-6964*x+x^2).

MATHEMATICA

LinearRecurrence[{6964, -1}, {0, 531}, 20] (* Harvey P. Dale, Nov 21 2011 *)

PROG

(MAGMA) I:=[0, 531]; [n le 2 select I[n] else 6964*Self(n-1)-Self(n-2): n in [1..15]];

CROSSREFS

Cf. A174753.

Sequence in context: A225937 A225936 A098257 * A191950 A048055 A067803

Adjacent sequences:  A174777 A174778 A174779 * A174781 A174782 A174783

KEYWORD

nonn,easy

AUTHOR

Vincenzo Librandi, Apr 15 2010

EXTENSIONS

More terms from Harvey P. Dale, Nov 21 2011

STATUS

approved

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Last modified November 13 04:20 EST 2019. Contains 329085 sequences. (Running on oeis4.)