Product t2(q^d); d | 18, where t2 = theta2(q)/(2*q^(1/4)).

Terms

a(0) =1a(1) =1a(2) =1a(3) =3a(4) =1a(5) =2a(6) =5a(7) =2a(8) =3a(9) =8a(10) =5a(11) =5a(12) =13a(13) =4a(14) =5a(15) =16a(16) =8a(17) =7a(18) =20a(19) =11a(20) =10a(21) =32a(22) =10a(23) =13a(24) =32a(25) =15a(26) =17a(27) =38a(28) =19a(29) =19