Expansion of e.g.f. -log(1 + 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) =1904a(9) =15120a(10) =132600a(11) =1293600a(12) =14673120a(13) =178738560a(14) =2341182480a(15) =32915282400a(16) =499117301760