Expansion of Sum_{1<=i<=j} q^(i+j)/( (1-q^i)*(1-q^j) )^2.

Terms

a(0) =1a(1) =5a(2) =14a(3) =29a(4) =55a(5) =86a(6) =140a(7) =191a(8) =285a(9) =355a(10) =511a(11) =595a(12) =818a(13) =938a(14) =1240a(15) =1356a(16) =1810a(17) =1905a(18) =2471a(19) =2640a(20) =3297a(21) =3410a(22) =4415a(23) =4399a(24) =5495a(25) =5690a(26) =6930a(27) =6895a(28) =8718a(29) =8440