G.f. A(x) where A000081(x) = x*A(A000081(x)).

Terms

a(0) =1a(1) =1a(2) =1a(3) =0a(4) =0a(5) =-1a(6) =3a(7) =-5a(8) =7a(9) =-8a(10) =1a(11) =24a(12) =-62a(13) =82a(14) =-60a(15) =52a(16) =-242a(17) =877a(18) =-1979a(19) =2747a(20) =-924a(21) =-7309a(22) =28389a(23) =-79469a(24) =205108a(25) =-468281a(26) =821680a(27) =-772531a(28) =-1046280a(29) =6962678