OFFSET
1,2
FORMULA
E.g.f.: series reversion of arctanh(x) / exp(x).
MATHEMATICA
nmax = 20; CoefficientList[InverseSeries[Series[ArcTanh[x]/Exp[x], {x, 0, nmax}], x], x] Range[0, nmax]! // Rest
CROSSREFS
KEYWORD
sign
AUTHOR
Ilya Gutkovskiy, May 13 2020
STATUS
approved