OFFSET
0,2
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 0..200
Index entries for linear recurrences with constant coefficients, signature (0,0,0,2302,0,0,0,-1).
FORMULA
G.f.: -(x^2-5*x-1)*(x^4+12*x^2+1) / ((x^4-48*x^2+1)*(x^4+48*x^2+1)). - Colin Barker, Nov 22 2013
a(n) = 2302*a(n-4) - a(n-8) for n>7. - Vincenzo Librandi, Dec 23 2013
MATHEMATICA
Denominator[Convergents[Sqrt[368], 30]] (* Vincenzo Librandi, Dec 23 2013 *)
LinearRecurrence[{0, 0, 0, 2302, 0, 0, 0, -1}, {1, 5, 11, 60, 2291, 11515, 25321, 138120}, 30] (* Harvey P. Dale, Nov 21 2015 *)
PROG
(Magma) I:=[1, 5, 11, 60, 2291, 11515, 25321, 138120]; [n le 8 select I[n] else 2302*Self(n-4)-Self(n-8): n in [1..40]]; // Vincenzo Librandi, Dec 23 2013
CROSSREFS
KEYWORD
nonn,frac,easy
AUTHOR
EXTENSIONS
More terms from Colin Barker, Nov 22 2013
STATUS
approved