Expansion of Sum_{k>0} (1/(1 - k*x^k)^3 - 1).

Terms

a(0) =3a(1) =12a(2) =19a(3) =51a(4) =36a(5) =180a(6) =57a(7) =405a(8) =352a(9) =918a(10) =111a(11) =3990a(12) =144a(13) =5064a(14) =6534a(15) =15945a(16) =222a(17) =51462a(18) =267a(19) =99354a(20) =82478a(21) =160812a(22) =369a(23) =808490a(24) =66051a(25) =861630a(26) =1090342a(27) =2593614a(28) =552a(29) =8966414