G.f. satisfies: A(x) = Sum_{n>=0} x^n/(1 - x*A(x)^n)^n.

Terms

a(0) =1a(1) =1a(2) =2a(3) =5a(4) =16a(5) =60a(6) =248a(7) =1098a(8) =5127a(9) =24996a(10) =126353a(11) =658914a(12) =3531891a(13) =19406185a(14) =109079066a(15) =626240743a(16) =3668020847a(17) =21899151005a(18) =133179027307a(19) =824588095681