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

Terms

a(0) =1a(1) =1a(2) =6a(3) =-9a(4) =-244a(5) =-39a(6) =11262a(7) =36971a(8) =-268890a(9) =-3724293a(10) =-24899558a(11) =159971919a(12) =3851093928a(13) =9663394063a(14) =-197371002600