Expansion of 1/Product_{m>=1} (1 - m*q^m)^2.

Terms

a(0) =1a(1) =2a(2) =7a(3) =18a(4) =49a(5) =114a(6) =282a(7) =624a(8) =1422a(9) =3058a(10) =6597a(11) =13700a(12) =28564a(13) =57698a(14) =116479a(15) =230398a(16) =453698a(17) =879080a(18) =1696732a(19) =3230578a(20) =6124326a(21) =11486884a(22) =21439480a(23) =39659598a(24) =73036175a(25) =133445640a(26) =242756058a(27) =438680734a(28) =789328034a(29) =1411926186