

A174777


yvalues 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
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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(n1)a(n2) with a(1)=0, a(2)=6.
G.f.: 6*x^2/(174*x+x^2).


MATHEMATICA

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


PROG

(Magma) I:=[0, 6]; [n le 2 select I[n] else 74*Self(n1)Self(n2): 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



