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

Terms

a(0) =1a(1) =1a(2) =2a(3) =4a(4) =12a(5) =36a(6) =112a(7) =360a(8) =1184a(9) =3969a(10) =13506a(11) =46550a(12) =162160a(13) =570076a(14) =2019864a(15) =7205654a(16) =25859788a(17) =93299268a(18) =338207096a(19) =1231194329a(20) =4499137382a(21) =16498152995a(22) =60689045230a(23) =223891151262a(24) =828156420320