OFFSET
0,4
FORMULA
a(n) ~ (n-1)! * (-1)^(n+1) / 2 * (((2-exp(1))*exp(1))/(exp(1)-exp(2)+sqrt(2*(exp(1)-1)*exp(1))))^n. - Vaclav Kotesovec, Nov 01 2013
MATHEMATICA
CoefficientList[Series[ArcTanh[Log[x+1]-ArcSinh[x]], {x, 0, 20}], x]* Range[0, 20]! (* Vaclav Kotesovec, Nov 01 2013 *)
CROSSREFS
KEYWORD
sign
AUTHOR
Patrick Demichel (patrick.demichel(AT)hp.com)
EXTENSIONS
Prepended missing a(0)=0, a(1)=0 from Vaclav Kotesovec, Nov 01 2013
STATUS
approved