Product t2(q^d); d | 3, where t2 = theta2(q) / (2 * q^(1/4)).

Terms

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