A176376 y-values in the solution to x^2-69*y^2=1.

0, 936, 14554800, 226327139064, 3519386997890400, 54726467590868580936, 850996567518619435664400, 13232996570188064633712839064

Offset

1,2

Comments

The corresponding values of x of this Pell equation are in A176375.

Links

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

Index entries for linear recurrences with constant coefficients, signature (15550,-1).

Formula

a(n) = 15550*a(n-1)-a(n-2) with a(1)=0, a(2)=936.

G.f.: 936*x^2/(1-15550*x+x^2).

Mathematica

LinearRecurrence[{15550, -1}, {0, 936}, 20]

Prog

(Magma) I:=[0, 936]; [n le 2 select I[n] else 15550*Self(n-1)-Self(n-2): n in [1..10]];

Crossrefs

Cf. A176375.

Sequence in context: A206835 A206897 A207287 * A031902 A204072 A259641

Adjacent sequences: A176373 A176374 A176375 * A176377 A176378 A176379

Keyword

nonn,easy

Author

Vincenzo Librandi, Apr 16 2010

Status

approved