Expansion of e.g.f. arcsin(x*exp(x)).

Terms

a(0) =0a(1) =1a(2) =2a(3) =4a(4) =16a(5) =104a(6) =816a(7) =7792a(8) =89216a(9) =1177920a(10) =17603200a(11) =294334976a(12) =5442281472a(13) =110221745152