Expansion of Product_{m>=1} (1 + m*q^m)^9.

Terms

a(0) =1a(1) =9a(2) =54a(3) =273a(4) =1197a(5) =4761a(6) =17577a(7) =60957a(8) =200799a(9) =633007a(10) =1920510a(11) =5633667a(12) =16037700a(13) =44439840a(14) =120165858a(15) =317762553a(16) =823240341a(17) =2092864401a(18) =5228118701a(19) =12848849154a(20) =31100190048a(21) =74208885351a(22) =174708121455a(23) =406132690635a(24) =932871440739