G.f. A(x) satisfies: A( A(x)^2 - 2*A(x)^3 ) = x*A(x).

Terms

a(0) =1a(1) =2a(2) =6a(3) =28a(4) =150a(5) =848a(6) =4988a(7) =30320a(8) =189030a(9) =1201792a(10) =7761296a(11) =50774280a(12) =335776204a(13) =2241022944a(14) =15075584864a(15) =102113820256a(16) =695842808070