G.f. A(x) satisfies A(x) = 1 + x*A(x)/A(-x*A(x))^4.

Terms

a(0) =1a(1) =1a(2) =5a(3) =3a(4) =-51a(5) =-190a(6) =-401a(7) =3672a(8) =51925a(9) =151539a(10) =-482538a(11) =-9063614a(12) =-79813421a(13) =-183787112a(14) =1737820084a(15) =22402935304a(16) =179028179329a(17) =459719628273