OFFSET
0,2
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 0..200
FORMULA
G.f.: conjecture T(0)/(1+5*x), where T(k) = 1 - 36*x^2*(k+1)^2/(36*x^2*(k+1)^2 + (1+5*x)^2/T(k+1) ); (continued fraction). - Sergei N. Gladkovskii, Nov 12 2013
a(n) = (-6)^n*skp(n, 5/6), where skp(n,x) are the Swiss-Knife polynomials A153641. - Peter Luschny, Apr 19 2014
MATHEMATICA
Numerator[EulerE[Range[0, 20], 1/12]] (* Vincenzo Librandi, May 05 2012 *)
CROSSREFS
KEYWORD
sign,frac
AUTHOR
N. J. A. Sloane, Nov 07 2009
STATUS
approved