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

Terms

a(0) =1a(1) =1a(2) =2a(3) =9a(4) =48a(5) =296a(6) =2008a(7) =14648a(8) =113200a(9) =917588a(10) =7746876a(11) =67770456a(12) =611916624a(13) =5685473544a(14) =54227943240a(15) =529937718704