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A174770 y-values in the solution to x^2 - 29*y^2 = 1. 2
0, 1820, 35675640, 699313893460, 13707950903927280, 268703252919468649100, 5267121150019473555730920, 103246108513978467719968844740, 2023830213823884774227355738862560 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

The corresponding values of x of this Pell equation are in A174769.

LINKS

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

Index entries for linear recurrences with constant coefficients, signature (19602,-1).

FORMULA

a(n) = 19602*a(n-1)-a(n-2) with a(1)=0, a(2)=1820.

G.f.: 1820*x^2/(1-19602*x+x^2).

MATHEMATICA

LinearRecurrence[{19602, -1}, {0, 1820}, 30]

PROG

(MAGMA) I:=[0, 1820]; [n le 2 select I[n] else 19602*Self(n-1)-Self(n-2): n in [1..20]];

CROSSREFS

Cf. A174769.

Sequence in context: A234660 A238030 A233719 * A218104 A171349 A256076

Adjacent sequences:  A174767 A174768 A174769 * A174771 A174772 A174773

KEYWORD

nonn,easy

AUTHOR

Vincenzo Librandi, Apr 14 2010

STATUS

approved

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Last modified January 20 21:49 EST 2021. Contains 340332 sequences. (Running on oeis4.)