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A174777 y-values in the solution to x^2 - 38*y^2 = 1. 2
0, 6, 444, 32850, 2430456, 179820894, 13304315700, 984339540906, 72827821711344, 5388274467098550, 398659482743581356, 29495413448557921794, 2182261935710542631400, 161457887829131596801806 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

The corresponding values of x of this Pell equation are in A174750.

LINKS

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

Index entries for linear recurrences with constant coefficients, signature (74,-1).

FORMULA

a(n) = 74*a(n-1)-a(n-2) with a(1)=0, a(2)=6.

G.f.: 6*x^2/(1-74*x+x^2).

MATHEMATICA

LinearRecurrence[{74, -1}, {0, 6}, 30]

PROG

(Magma) I:=[0, 6]; [n le 2 select I[n] else 74*Self(n-1)-Self(n-2): n in [1..20]];

CROSSREFS

Cf. A174750.

Sequence in context: A231316 A270066 A001328 * A265168 A187514 A258873

Adjacent sequences: A174774 A174775 A174776 * A174778 A174779 A174780

KEYWORD

nonn,easy

AUTHOR

Vincenzo Librandi, Apr 15 2010

STATUS

approved

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Last modified December 1 23:44 EST 2022. Contains 358485 sequences. (Running on oeis4.)