OFFSET
0,3
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, 0, 0, 177502, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, -1).
FORMULA
G.f.: -(x^22 -x^21 +2*x^20 -3*x^19 +11*x^18 -25*x^17 +161*x^16 -347*x^15 +1202*x^14 -1549*x^13 +2751*x^12 -4300*x^11 -2751*x^10 -1549*x^9 -1202*x^8 -347*x^7 -161*x^6 -25*x^5 -11*x^4 -3*x^3 -2*x^2 -x -1) / (x^24 -177502*x^12 +1). - Colin Barker, Nov 25 2013
a(n) = 177502*a(n-12) - a(n-24) for n>23. - Vincenzo Librandi, Dec 24 2013
MATHEMATICA
Denominator[Convergents[Sqrt[426], 30]] (* Harvey P. Dale, Apr 13 2012 *)
CoefficientList[Series[-(x^22 - x^21 + 2 x^20 - 3 x^19 + 11 x^18 - 25 x^17 + 161 x^16 - 347 x^15 + 1202 x^14 - 1549 x^13 + 2751 x^12 - 4300 x^11 - 2751 x^10 - 1549 x^9 - 1202 x^8 - 347 x^7 - 161 x^6 - 25 x^5 - 11 x^4 - 3 x^3 - 2 x^2 - x - 1)/(x^24 - 177502 x^12 + 1), {x, 0, 30}], x] (* Vincenzo Librandi, Dec 24 2013 *)
CROSSREFS
KEYWORD
nonn,easy,frac
AUTHOR
EXTENSIONS
More terms from Colin Barker, Nov 25 2013
STATUS
approved