OFFSET
0,3
MATHEMATICA
With[{nn=20}, CoefficientList[Series[Log[Sech[x]+ArcSinh[x]], {x, 0, nn}], x] Range[0, nn]!] (* Harvey P. Dale, Mar 22 2018 *)
CROSSREFS
KEYWORD
sign
AUTHOR
Patrick Demichel (patrick.demichel(AT)hp.com)
EXTENSIONS
Zero prepended and definition clarified by Harvey P. Dale, Mar 22 2018
STATUS
approved