G.f. satisfies: A(x) = 1 + x*A(x)^3/A(-x)^2.

Terms

a(0) =1a(1) =1a(2) =5a(3) =17a(4) =105a(5) =481a(6) =3261a(7) =16801a(8) =119697a(9) =656129a(10) =4819061a(11) =27447601a(12) =205776121a(13) =1202943457a(14) =9152680109a(15) =54524185409a(16) =419491297313