OFFSET
0,1
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 0..200
Index entries for linear recurrences with constant coefficients, signature (0,0,0,1618,0,0,0,-1).
FORMULA
G.f.: (1 + x)*(22 + 23*x + 359*x^2 + 450*x^3 - 68*x^4 + 23*x^5 - x^6)/(1 - 1618*x^4 + x^8). [Bruno Berselli, Nov 12 2013]
MATHEMATICA
Numerator[Convergents[Sqrt[505], 30]] (* Vincenzo Librandi, Nov 12 2013 *)
CROSSREFS
KEYWORD
nonn,cofr,frac,easy,less
AUTHOR
STATUS
approved