Expansion of e.g.f. -LambertW(x^3 * log(1-x))/6.

Terms

a(0) =0a(1) =0a(2) =0a(3) =0a(4) =4a(5) =10a(6) =40a(7) =210a(8) =8064a(9) =70560a(10) =640800a(11) =6375600a(12) =189383040a(13) =3165402240a(14) =48879754560a(15) =762766804800