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A174853 y-values in the solution to x^2-47*y^2=1. 2
0, 7, 672, 64505, 6191808, 594349063, 57051318240, 5476332201977, 525670840071552, 50458924314667015, 4843531063367961888, 464928523159009674233, 44628294692201560764480 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

The corresponding values of x of this Pell equation are in A174755.

LINKS

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

Index entries for linear recurrences with constant coefficients, signature (96,-1).

FORMULA

a(n) = 96*a(n-1)-a(n-2) with a(1)=0, a(2)=7.

G.f.: 7*x^2/(1-96*x+x^2).

MATHEMATICA

LinearRecurrence[{96, -1}, {0, 7}, 30]

PROG

(MAGMA) I:=[0, 7]; [n le 2 select I[n] else 96*Self(n-1)-Self(n-2): n in [1..20]];

CROSSREFS

Cf. A174755.

Sequence in context: A074282 A171737 A013568 * A228928 A038803 A144957

Adjacent sequences:  A174850 A174851 A174852 * A174854 A174855 A174856

KEYWORD

nonn,easy

AUTHOR

Vincenzo Librandi, Apr 15 2010

STATUS

approved

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Last modified September 22 20:30 EDT 2018. Contains 315270 sequences. (Running on oeis4.)