G.f. A(x) satisfies: A(x^3*R(x)) = x^4 - x^5 where A(R(x)) = x.

Terms

a(0) =1a(1) =1a(2) =2a(3) =5a(4) =15a(5) =47a(6) =153a(7) =513a(8) =1765a(9) =6193a(10) =22071a(11) =79664a(12) =290636a(13) =1070030a(14) =3970554a(15) =14834370a(16) =55755406a(17) =210671102a(18) =799783375a(19) =3049139589a(20) =11669146635a(21) =44812839601a(22) =172636642278a(23) =666981050965