Expansion of ( Sum_{k>=0} k*q^(k^2) )^3.

Terms

a(0) =0a(1) =0a(2) =0a(3) =1a(4) =0a(5) =0a(6) =6a(7) =0a(8) =0a(9) =12a(10) =0a(11) =9a(12) =8a(13) =0a(14) =36a(15) =0a(16) =0a(17) =36a(18) =12a(19) =27a(20) =0a(21) =48a(22) =54a(23) =0a(24) =48a(25) =0a(26) =72a(27) =42a(28) =0a(29) =144