Expansion of ( Sum_{k>=0} k^2 * q^(k^2) )^4.

Terms

a(0) =0a(1) =0a(2) =0a(3) =0a(4) =1a(5) =0a(6) =0a(7) =16a(8) =0a(9) =0a(10) =96a(11) =0a(12) =36a(13) =256a(14) =0a(15) =432a(16) =256a(17) =0a(18) =1728a(19) =64a(20) =486a(21) =2304a(22) =768a(23) =3888a(24) =0a(25) =3072a(26) =7776a(27) =1728a(28) =7112a(29) =0