E.g.f.: tanh(arctan(x)+log(x+1))=2*x-1/2!*x^2-16/3!*x^3+42/4!*x^4+500/5!*x^5...

A012967

E.g.f.: tanh(arctan(x)+log(x+1))=2*x-1/2!*x^2-16/3!*x^3+42/4!*x^4+500/5!*x^5...

Terms

    a(0) =0a(1) =2a(2) =-1a(3) =-16a(4) =42a(5) =500a(6) =-3210a(7) =-31960a(8) =409640a(9) =3197360a(10) =-78190200a(11) =-405352000a(12) =20714298000a(13) =39783504800

External references