Expansion of e.g.f. exp(arctanh(x)+log(x+1)).

Terms

a(0) =1a(1) =2a(2) =3a(3) =6a(4) =21a(5) =90a(6) =495a(7) =3150a(8) =23625a(9) =198450a(10) =1885275a(11) =19646550a(12) =225935325a(13) =2809456650a(14) =37927664775a(15) =547844046750