OFFSET
0,2
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 0..200
Index entries for linear recurrences with constant coefficients, signature (0,106,0,-1).
FORMULA
G.f.: -(x^2-2*x-1) / (x^4-106*x^2+1). - Colin Barker, Dec 09 2013
a(n) = 106*a(n-2) - a(n-4) for n>3. - Vincenzo Librandi, Jan 20 2014
MATHEMATICA
Denominator[Convergents[Sqrt[702], 30]] (* Vincenzo Librandi, Jan 20 2014 *)
LinearRecurrence[{0, 106, 0, -1}, {1, 2, 105, 212}, 20] (* Harvey P. Dale, Apr 19 2020 *)
PROG
(Magma) I:=[1, 2, 105, 212]; [n le 4 select I[n] else 106*Self(n-2)-Self(n-4): n in [1..30]]; // Vincenzo Librandi, Jan 20 2014
CROSSREFS
KEYWORD
nonn,frac,easy
AUTHOR
EXTENSIONS
Additional term from Colin Barker, Dec 09 2013
STATUS
approved