E.g.f. satisfies A(x)^A(x) = 1/(1 - x)^x.

Terms

a(0) =1a(1) =0a(2) =2a(3) =3a(4) =-4a(5) =-30a(6) =294a(7) =3780a(8) =-7904a(9) =-444528a(10) =78840a(11) =99657360a(12) =539299848a(13) =-27852945120a(14) =-361237078944