OFFSET
0,2
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 0..200
Index entries for linear recurrences with constant coefficients, signature (0,0,0,0,0,24302,0,0,0,0,0,-1).
FORMULA
G.f.: -(x^10 -3*x^9 +7*x^8 -87*x^7 +181*x^6 -630*x^5 -181*x^4 -87*x^3 -7*x^2 -3*x -1) / ((x^4 -29*x^2 +1)*(x^8 +29*x^6 +840*x^4 +29*x^2 +1)). - Colin Barker, Nov 22 2013
a(n) = 24302*a(n-6) - a(n-12) for n>11. - Vincenzo Librandi, Dec 23 2013
MATHEMATICA
Denominator[Convergents[Sqrt[372], 30]] (* Vincenzo Librandi, Dec 23 2013 *)
PROG
(Magma) I:=[1, 3, 7, 87, 181, 630, 24121, 72993, 170107, 2114277, 4398661, 15310260]; [n le 12 select I[n] else 24302*Self(n-6)-Self(n-12): 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