Expansion of e.g.f.: arctanh(sech(x)*log(x+1))=x-1/2!*x^2+1/3!*x^3-12/4!*x^4+63/5!*x^5...

A012875

Expansion of e.g.f.: arctanh(sech(x)*log(x+1))=x-1/2!*x^2+1/3!*x^3-12/4!*x^4+63/5!*x^5...

Terms

    a(0) =0a(1) =1a(2) =-1a(3) =1a(4) =-12a(5) =63a(6) =-375a(7) =3687a(8) =-35056a(9) =378613a(10) =-4917645a(11) =67955413a(12) =-1033969596a(13) =17404675923a(14) =-314140085987

External references