OFFSET
1,2
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 1..200
MATHEMATICA
With[{nn=30}, Take[CoefficientList[Series[ArcTan[Sinh[x]Cos[x]], {x, 0, nn}], x] Range[0, nn-1]!, {2, -1, 2}]] (* Harvey P. Dale, May 16 2012 *)
CROSSREFS
KEYWORD
sign
AUTHOR
Patrick Demichel (patrick.demichel(AT)hp.com)
EXTENSIONS
Definition clarified by Harvey P. Dale, May 16 2012
STATUS
approved