Expansion of Product_{k>=1} (Product_{j=1..k} 1/(1 - x^(k*j))^j).

Terms

a(0) =1a(1) =1a(2) =2a(3) =3a(4) =7a(5) =9a(6) =17a(7) =23a(8) =41a(9) =58a(10) =93a(11) =127a(12) =205a(13) =281a(14) =423a(15) =583a(16) =869a(17) =1180a(18) =1716a(19) =2322a(20) =3317a(21) =4479a(22) =6282a(23) =8406a(24) =11696a(25) =15589a(26) =21343a(27) =28325a(28) =38480a(29) =50756