OFFSET
1,2
COMMENTS
The corresponding values of y of this Pell equation are in A176364.
The next term has 67 digits. [From Harvey P. Dale, Jan. 15, 2011]
REFERENCES
Edward J. Barbeau, Pell's Equation (Springer-Verlag 2003) at pp. 23-24.
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 1..100
N. J. A. Sloane et al., Binary Quadratic Forms and OEIS (Index to related sequences, programs, references)
N. J. Wildberger, Pell's equation without irrational numbers, J. Int. Seq. 13 (2010), 10.4.3, Section 7.
Index entries for linear recurrences with constant coefficients, signature (3532638098,-1).
FORMULA
a(n) = 3532638098*a(n-1)-a(n-2) with a(1)=1, a(2)=1766319049.
G.f.: x*(1-1766319049*x)/(1-3532638098*x+x^2).
MATHEMATICA
LinearRecurrence[{3532638098, -1}, {1, 1766319049}, 20]
PROG
(Magma) I:=[1, 1766319049]; [n le 2 select I[n] else 3532638098*Self(n-1)-Self(n-2): n in [1..10]];
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Vincenzo Librandi, Apr 13 2010
STATUS
approved