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A176381 y-values in the solution to x^2-71*y^2=1. 2
0, 413, 2874480, 20006380387, 139244404619040, 969141036142138013, 6745221472304875951440, 46946740478100900479884387, 326749306982360795035119382080 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

The corresponding values of x of this Pell equation are in A176380.

LINKS

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

Index entries for linear recurrences with constant coefficients, signature (6960,-1).

FORMULA

a(n) = 6960*a(n-1)-a(n-2) with a(1)=0, a(2)=413.

G.f.: 413*x^2/(1-6960*x+x^2).

MATHEMATICA

LinearRecurrence[{6960, -1}, {0, 413}, 20]

PROG

(MAGMA) I:=[0, 413]; [n le 2 select I[n] else 6960*Self(n-1)-Self(n-2): n in [1..20]];

CROSSREFS

Cf. A176380.

Sequence in context: A205755 A250945 A205585 * A027661 A260472 A253489

Adjacent sequences:  A176378 A176379 A176380 * A176382 A176383 A176384

KEYWORD

nonn,easy

AUTHOR

Vincenzo Librandi, Apr 16 2010

STATUS

approved

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Last modified October 17 08:36 EDT 2019. Contains 328107 sequences. (Running on oeis4.)