OFFSET
0,3
FORMULA
E.g.f.: (x+sqrt(1+x^2))^(exp(x)). - Vaclav Kotesovec, Oct 31 2013
a(n) ~ 2*sin(n*Pi/2-1-Pi*cos(1)/2) * exp(-Pi*sin(1)/2) * n^(n-1) / exp(n). - Vaclav Kotesovec, Oct 31 2013
MATHEMATICA
CoefficientList[Series[Exp[ArcSinh[x]*Exp[x]], {x, 0, 20}], x]* Range[0, 20]! (* Vaclav Kotesovec, Oct 31 2013 *)
CROSSREFS
KEYWORD
sign
AUTHOR
Patrick Demichel (patrick.demichel(AT)hp.com)
STATUS
approved