OFFSET
1,1
COMMENTS
Values of y satisfying the Pellian equation x^2 - 10*y^2 = 4.
LINKS
Colin Barker, Table of n, a(n) for n = 1..600
Index entries for linear recurrences with constant coefficients, signature (38,-1).
FORMULA
EXAMPLE
456 is in the sequence because 10*456^2+4 = 2079364 = 1442^2.
MATHEMATICA
LinearRecurrence[{38, -1}, {12, 456}, 20] (* Harvey P. Dale, Aug 04 2022 *)
PROG
(PARI) Vec(12/(x^2-38*x+1) + O(x^100))
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Colin Barker, Mar 17 2014
STATUS
approved