A009248 Expansion of e.g.f.: exp(tan(x).exp(x)).

1, 1, 3, 12, 57, 332, 2209, 16730, 140609, 1302664, 13137441, 143354574, 1680017889, 21043179068, 280310970385, 3955899181730, 58931602709633, 923925812276752, 15201851967182913, 261859798838325270

Offset: 0

Author

R. H. Hardin

Keywords

• nonn
• easy

Programs

Mathematica

With[{nn=20},CoefficientList[Series[Exp[Tan[x]*Exp[x]],{x,0,nn}],x] Range[0,nn]!] (* Harvey P. Dale, Jun 11 2014 *)

Extensions

Extended and signs tested Mar 15 1997 by Olivier Gérard.

Previous Mathematica program replaced and definition clarified by Harvey P. Dale, Jun 11 2014