OFFSET
0,4
FORMULA
a(n) ~ n! * (-1)^(n+1) * (sqrt(2)-1)/2. - Vaclav Kotesovec, Feb 04 2015
MATHEMATICA
With[{nn = 20}, CoefficientList[Series[Sinh[Log[x + 1] - ArcSinh[x]], {x, 0, nn}], x] Range[0, nn]!] (* Harvey P. Dale, Dec 08 2012 *)
CROSSREFS
KEYWORD
sign
AUTHOR
Patrick Demichel (patrick.demichel(AT)hp.com)
EXTENSIONS
Prepended the two initial zeros, Joerg Arndt, Dec 08 2012.
STATUS
approved