Expansion of Product_{k>=1} (1 + x^(k^3)) * (1 + x^k).

Terms

a(0) =1a(1) =2a(2) =2a(3) =3a(4) =4a(5) =5a(6) =7a(7) =9a(8) =12a(9) =16a(10) =20a(11) =25a(12) =31a(13) =38a(14) =47a(15) =58a(16) =70a(17) =84a(18) =102a(19) =122a(20) =145a(21) =173a(22) =205a(23) =242a(24) =285a(25) =334a(26) =391a(27) =458a(28) =534a(29) =620