OFFSET
0,1
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
a(n) = 1339756*a(n-10) - a(n-20) for n>19. - Bruno Berselli, Nov 07 2013
G.f.: -(x^19 -20*x^18 +261*x^17 -542*x^16 +803*x^15 -2951*x^14 +3754*x^13 -14213*x^12 +17967*x^11 -50147*x^10 -669878*x^9 -50147*x^8 -17967*x^7 -14213*x^6 -3754*x^5 -2951*x^4 -803*x^3 -542*x^2 -261*x -20) / (x^20 -1339756*x^10 +1). - Colin Barker, Dec 28 2013
MATHEMATICA
Numerator[Convergents[Sqrt[403], 30]] (* Vincenzo Librandi, Nov 07 2013 *)
PROG
(PARI) Vec(-(x^19-20*x^18+261*x^17-542*x^16+803*x^15-2951*x^14+3754*x^13-14213*x^12+17967*x^11-50147*x^10-669878*x^9-50147*x^8-17967*x^7-14213*x^6-3754*x^5-2951*x^4-803*x^3-542*x^2-261*x-20)/(x^20-1339756*x^10+1)+O(x^99)) \\ Charles R Greathouse IV, Jun 12 2015
CROSSREFS
KEYWORD
nonn,frac,easy,less
AUTHOR
EXTENSIONS
More terms from Colin Barker, Dec 28 2013
STATUS
approved