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, 67714, 0, 0, 0, 0, 0, -1).
FORMULA
G.f.: -(x^10 -2*x^9 +9*x^8 -182*x^7 +737*x^6 -1656*x^5 -737*x^4 -182*x^3 -9*x^2 -2*x-1) / (x^12-67714*x^6+1). - Colin Barker, Nov 24 2013
a(n) = 67714*a(n-6) - a(n-12) for n>11. - Vincenzo Librandi, Dec 24 2013
MATHEMATICA
Denominator[Convergents[Sqrt[418], 30]] (* Vincenzo Librandi, Dec 24 2013 *)
PROG
(Magma) I:=[1, 2, 9, 182, 737, 1656, 66977, 135610, 609417, 12323950, 49905217, 112134384]; [n le 12 select I[n] else 67714*Self(n-6)-Self(n-12): n in [1..50]]; // Vincenzo Librandi, Dec 24 2013
CROSSREFS
KEYWORD
nonn,frac,easy
AUTHOR
EXTENSIONS
More terms from Colin Barker, Nov 24 2013
STATUS
approved