G.f. A(x) satisfies: 1 = Sum_{n>=0} x^n * (1 + x^n*A(x))^n / (1 + x^(n+1)*A(x))^(n+1).

Terms

a(0) =1a(1) =3a(2) =7a(3) =17a(4) =37a(5) =77a(6) =143a(7) =218a(8) =205a(9) =-260a(10) =-2120a(11) =-7359a(12) =-18850a(13) =-36275a(14) =-38243a(15) =75763a(16) =636582a(17) =2518615a(18) =7562260a(19) =18326392a(20) =33734309a(21) =29439139a(22) =-106574279a(23) =-745021520a(24) =-2876904500a(25) =-8612026926a(26) =-20904359944a(27) =-38363726381a(28) =-31422406713a(29) =137039078742