G.f. satisfies A(x) = 1 + x*A(x)^2 + x^2*A(x)^7.

Terms

a(0) =1a(1) =1a(2) =3a(3) =14a(4) =76a(5) =448a(6) =2791a(7) =18078a(8) =120516a(9) =821435a(10) =5698422a(11) =40101623a(12) =285583775a(13) =2054272430a(14) =14903954415a(15) =108932920861a(16) =801350333186