G.f. C(x) satisfies: C(C(x)) + S(S(x)) = x such that C(x)^3 + (3/2)*S(x)^3 = x^3.

Terms

a(0) =1a(1) =0a(2) =0a(3) =-108a(4) =0a(5) =0a(6) =-46656a(7) =0a(8) =0a(9) =-56267136a(10) =0a(11) =0a(12) =-91334158848a(13) =0a(14) =0a(16) =0a(17) =0a(19) =0a(20) =0a(22) =0a(23) =0a(25) =0a(26) =0a(28) =0a(29) =0a(31) =0a(32) =0