G.f. satisfies: A(x) = x/(x - B(x^2)) where B(x/A(x)) = x and B(x) is the g.f. of A141200.

Terms

a(0) =1a(1) =1a(2) =1a(3) =2a(4) =3a(5) =6a(6) =10a(7) =21a(8) =37a(9) =79a(10) =144a(11) =311a(12) =580a(13) =1262a(14) =2393a(15) =5236a(16) =10055a(17) =22095a(18) =42857a(19) =94495a(20) =184784a(21) =408557a(22) =804331a(23) =1782470a(24) =3529190a(25) =7836235a(26) =15591086a(27) =34676360a(28) =69284645a(29) =154320310