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A175014 y-values in the solution to x^2-55*y^2=1. 2
0, 12, 2136, 380196, 67672752, 12045369660, 2144008126728, 381621401187924, 67926465403323744, 12090529220390438508, 2152046274764094730680, 383052146378788471622532, 68181130009149583854080016 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

The corresponding values of x of this Pell equation are in A174758.

LINKS

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

Index entries for linear recurrences with constant coefficients, signature (178,-1).

FORMULA

a(n) = 178*a(n-1)-a(n-2) with a(1)=0, a(2)=12.

G.f.: 12*x^2/(1-178*x+x^2).

MATHEMATICA

LinearRecurrence[{178, -1}, {0, 12}, 30]

PROG

(MAGMA) I:=[0, 12]; [n le 2 select I[n] else 178*Self(n-1)-Self(n-2): n in [1..20]];

CROSSREFS

Cf. A174758.

Sequence in context: A004823 A009063 A012675 * A101812 A064074 A005249

Adjacent sequences:  A175011 A175012 A175013 * A175015 A175016 A175017

KEYWORD

nonn,easy

AUTHOR

Vincenzo Librandi, Apr 15 2010

STATUS

approved

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Last modified February 25 08:33 EST 2021. Contains 341606 sequences. (Running on oeis4.)