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

Terms

a(0) =1a(1) =2a(2) =4a(3) =9a(4) =19a(5) =37a(6) =72a(7) =134a(8) =246a(9) =442a(10) =782a(11) =1359a(12) =2338a(13) =3964a(14) =6652a(15) =11046a(16) =18176a(17) =29631a(18) =47935a(19) =76931a(20) =122608a(21) =194072a(22) =305269a(23) =477258a(24) =741977a(25) =1147227a(26) =1764778a(27) =2701403a(28) =4115892a(29) =6242846