Expansion of Product_{m>=1} (1-m*q^m)^-3.

Terms

a(0) =1a(1) =3a(2) =12a(3) =37a(4) =114a(5) =312a(6) =855a(7) =2178a(8) =5496a(9) =13302a(10) =31719a(11) =73482a(12) =168086a(13) =375984a(14) =830976a(15) =1805887a(16) =3880746a(17) =8225460a(18) =17262440a(19) =35809446a(20) =73621776a(21) =149875003a(22) =302635110a(23) =605861124a(24) =1204043358a(25) =2374645746