G.f. satisfies A(x) = 1 + x*A(x)^2 + x^2*A(x)^6.

Terms

a(0) =1a(1) =1a(2) =3a(3) =13a(4) =65a(5) =353a(6) =2024a(7) =12057a(8) =73890a(9) =462851a(10) =2950261a(11) =19073921a(12) =124776881a(13) =824409052a(14) =5493384031a(15) =36874564529a(16) =249114808794