Expansion of e.g.f. exp( x * (exp(x^4) - 1) ).

Terms

a(0) =1a(1) =0a(2) =0a(3) =0a(4) =0a(5) =120a(6) =0a(7) =0a(8) =0a(9) =181440a(10) =1814400a(11) =0a(12) =0a(13) =1037836800a(14) =43589145600a(15) =217945728000a(16) =0