E.g.f.: (log(1-x))^2/(1+log(1-x)).

Terms

a(0) =0a(1) =0a(2) =2a(3) =12a(4) =82a(5) =670a(6) =6458a(7) =72072a(8) =915864a(9) =13068768a(10) =206998032a(11) =3604604256a(12) =68455569840