Expansion of Product_{m>=1} (1 + m*q^m)^12.

Terms

a(0) =1a(1) =12a(2) =90a(3) =544a(4) =2823a(5) =13116a(6) =55982a(7) =222936a(8) =838011a(9) =2998896a(10) =10282986a(11) =33959016a(12) =108458924a(13) =336141084a(14) =1013801700a(15) =2982628712a(16) =8577246237a(17) =24152726184a(18) =66699488360a(19) =180885417408a(20) =482312100000