OFFSET
0,3
FORMULA
a(n) ~ n! * ((-1)^(n+1)*exp(-1) + exp(1)) * (2/Pi)^(n+1). - Vaclav Kotesovec, Jan 23 2015
MATHEMATICA
Tan[ x ]*Exp[ Sin[ x ] ]
CoefficientList[Series[E^Sin[x]*Tan[x], {x, 0, 20}], x] * Range[0, 20]! (* Vaclav Kotesovec, Jan 23 2015 *)
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
EXTENSIONS
Extended and signs tested Mar 15 1997 by Olivier Gérard.
STATUS
approved