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

Terms

a(0) =0a(1) =0a(2) =0a(3) =0a(4) =4a(5) =10a(6) =40a(7) =210a(8) =2464a(9) =20160a(10) =178800a(11) =1755600a(12) =22323840a(13) =289729440a(14) =3950069760a(15) =57127870800a(16) =921032555520