OFFSET
0,3
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 0..300
EXAMPLE
x + 2/2!*x^2 - 24/4!*x^4 - 132/5!*x^5 + 40/6!*x^6 ...
MATHEMATICA
Range[0, 19]! CoefficientList[Series[ArcTan[ArcSinh[x] Exp[x]], {x, 0, 19}], x] (* Vincenzo Librandi, Jul 20 2018 *)
CROSSREFS
KEYWORD
sign
AUTHOR
Patrick Demichel (patrick.demichel(AT)hp.com)
EXTENSIONS
a(0) inserted and title improved by Sean A. Irvine, Jul 19 2018
STATUS
approved