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

Terms

a(0) =1a(1) =0a(2) =0a(3) =0a(4) =4a(5) =0a(6) =0a(7) =70a(8) =560a(9) =0a(10) =2800a(11) =92400a(12) =369600a(13) =200200a(14) =19619600a(15) =252252000a(16) =695094400a(17) =5717712000a(18) =171531360000