Expansion of Product_{k>=1} (1 + x^k) * (1 + x^(k^2)) * (1 + x^(k^3)).

Terms

a(0) =1a(1) =3a(2) =4a(3) =5a(4) =8a(5) =12a(6) =16a(7) =21a(8) =28a(9) =38a(10) =51a(11) =65a(12) =82a(13) =105a(14) =133a(15) =166a(16) =206a(17) =254a(18) =312a(19) =382a(20) =464a(21) =561a(22) =677a(23) =813a(24) =972a(25) =1160a(26) =1380a(27) =1636a(28) =1935a(29) =2281