arctanh(arctan(x)*exp(x))=x+2/2!*x^2+3/3!*x^3+20/4!*x^4+173/5!*x^5...

A012416

arctanh(arctan(x)*exp(x))=x+2/2!*x^2+3/3!*x^3+20/4!*x^4+173/5!*x^5...

Terms

    a(0) =0a(1) =1a(2) =2a(3) =3a(4) =20a(5) =173a(6) =1190a(7) =11039a(8) =140968a(9) =1855481a(10) =26494858a(11) =441706331a(12) =8105309500a(13) =159190672613

External references