Expansion of Product_{m>=1} (1+m*(m+1)*q^m).

Terms

a(0) =1a(1) =2a(2) =6a(3) =24a(4) =44a(5) =142a(6) =366a(7) =800a(8) =1636a(9) =4338a(10) =10154a(11) =18968a(12) =42368a(13) =80726a(14) =183914a(15) =401096a(16) =729944a(17) =1402098a(18) =2829814a(19) =5172416a(20) =10600836a(21) =21582558a(22) =37732782a(23) =70148512a(24) =127184636a(25) =236798322a(26) =416265730a(27) =804045376a(28) =1514022088a(29) =2581172630