Expansion of e.g.f. -log(1 - x)*arctanh(x).

Terms

a(0) =0a(1) =0a(2) =2a(3) =3a(4) =16a(5) =50a(6) =368a(7) =1764a(8) =16896a(9) =109584a(10) =1297152a(11) =10628640a(12) =149944320a(13) =1486442880a(14) =24349317120a(15) =283465647360