OFFSET
0,2
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 0..200
Index entries for linear recurrences with constant coefficients, signature (0,0,0,0,0,2050,0,0,0,0,0,-1).
FORMULA
G.f.: -(x^10 -2*x^9 +3*x^8 -14*x^7 +17*x^6 -48*x^5 -17*x^4 -14*x^3 -3*x^2 -2*x-1) / (x^12 -2050*x^6 +1). - Colin Barker, Nov 26 2013
a(n) = 2050*a(n-6) - a(n-12) for n>11. - Vincenzo Librandi, Dec 26 2013
MATHEMATICA
Denominator[Convergents[Sqrt[456], 30]] (* Vincenzo Librandi, Dec 26 2013 *)
PROG
(Magma) I:=[1, 2, 3, 14, 17, 48, 2033, 4114, 6147, 28702, 34849, 98400]; [n le 12 select I[n] else 2050*Self(n-6)-Self(n-12): n in [1..40]]; // Vincenzo Librandi, Dec 26 2013
CROSSREFS
KEYWORD
nonn,frac,easy
AUTHOR
EXTENSIONS
More terms from Colin Barker, Nov 26 2013
STATUS
approved