E.g.f.: arctan(arctanh(x)*exp(x))=x+2/2!*x^2+3/3!*x^3-12/4!*x^4-147/5!*x^5...

A012713

E.g.f.: arctan(arctanh(x)*exp(x))=x+2/2!*x^2+3/3!*x^3-12/4!*x^4-147/5!*x^5...

Terms

    a(0) =0a(1) =1a(2) =2a(3) =3a(4) =-12a(5) =-147a(6) =-890a(7) =63a(8) =76776a(9) =1130489a(10) =6587338a(11) =-92728933a(12) =-3395342500a(13) =-47724446811a(14) =-11416580786

External references