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

Terms

a(0) =1a(1) =1a(2) =2a(3) =7a(4) =32a(5) =175a(6) =1086a(7) =7429a(8) =54994a(9) =435120a(10) =3647686a(11) =32192596a(12) =297654824a(13) =2872372828a(14) =28841766844a(15) =300592170551