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, 0, 0, 0, 0, 1339756, 0, 0, 0, 0, 0, 0, 0, 0, 0, -1).
FORMULA
G.f.: -(x^18 -13*x^17 +27*x^16 -40*x^15 +147*x^14 -187*x^13 +708*x^12 -895*x^11 +2498*x^10 -33369*x^9 -2498*x^8 -895*x^7 -708*x^6 -187*x^5 -147*x^4 -40*x^3 -27*x^2 -13*x -1) / (x^20 -1339756*x^10 +1). - Colin Barker, Nov 24 2013
a(n) = 1339756*a(n-10) - a(n-20) for n>19. - Vincenzo Librandi, Dec 24 2013
MATHEMATICA
Denominator[Convergents[Sqrt[403], 30]] (* Vincenzo Librandi, Dec 24 2013 *)
CROSSREFS
KEYWORD
nonn,frac,easy
AUTHOR
EXTENSIONS
More terms from Colin Barker, Nov 24 2013
STATUS
approved