G.f. A(x) satisfies: A(x) = (1/(1 - x)) * A(x^2)*A(x^3)*A(x^5)* ... *A(x^prime(k))* ...

Terms

a(0) =1a(1) =1a(2) =2a(3) =3a(4) =5a(5) =7a(6) =12a(7) =16a(8) =24a(9) =33a(10) =48a(11) =64a(12) =93a(13) =122a(14) =169a(15) =224a(16) =303a(17) =395a(18) =532a(19) =686a(20) =907a(21) =1168a(22) =1523a(23) =1943a(24) =2521a(25) =3193a(26) =4094a(27) =5170a(28) =6573a(29) =8245