G.f. satisfies A(x) = 1 + x*A(x) / (1 + x*A(x))^2.

Terms

a(0) =1a(1) =1a(2) =-1a(3) =-2a(4) =5a(5) =6a(6) =-30a(7) =-13a(8) =189a(9) =-56a(10) =-1188a(11) =1266a(12) =7194a(13) =-14377a(14) =-40183a(15) =135278a(16) =188773a(17) =-1151800a(18) =-503880a(19) =9109076a(20) =-3419924a(21) =-67220176a(22) =80390824a(23) =458183898a(24) =-998680470a(25) =-2794491329a(26) =10156144385a(27) =13919066170a(28) =-92250872385a(29) =-36047778330