G.f. A(x) satisfies A(x)^3 = A(x^3) + 3*A(x^4).

Terms

a(0) =1a(1) =1a(2) =-1a(3) =2a(4) =-4a(5) =10a(6) =-24a(7) =60a(8) =-156a(9) =415a(10) =-1126a(11) =3099a(12) =-8630a(13) =24266a(14) =-68794a(15) =196433a(16) =-564358a(17) =1630219a(18) =-4731681a(19) =13792091a(20) =-40355104a(21) =118483124a(22) =-348949952a(23) =1030616162a(24) =-3051771509a(25) =9058068276a(26) =-26944245623a(27) =80310259922a(28) =-239820489258a(29) =717388363313