Expansion of Sum_{k>0} x^(3*k)/(1-x^k)^4.

Terms

a(0) =0a(1) =0a(2) =1a(3) =4a(4) =10a(5) =21a(6) =35a(7) =60a(8) =85a(9) =130a(10) =165a(11) =245a(12) =286a(13) =399a(14) =466a(15) =620a(16) =680a(17) =921a(18) =969a(19) =1274a(20) =1366a(21) =1705a(22) =1771a(23) =2325a(24) =2310a(25) =2886a(26) =3010a(27) =3679a(28) =3654a(29) =4666