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

Terms

a(0) =1a(1) =1a(2) =0a(3) =-2a(4) =-4a(5) =-3a(6) =6a(7) =26a(8) =46a(9) =22a(10) =-128a(11) =-455a(12) =-748a(13) =-149a(14) =2948a(15) =9400a(16) =14254a(17) =-1624a(18) =-72876a(19) =-212988a(20) =-294316a(21) =143030a(22) =1889284a(23) =5104273a(24) =6328244a(25) =-6017051a(26) =-50569884a(27) =-126812057a(28) =-138104146a(29) =216071703