Product t2(q^d); d | 36, where t2 = theta2(q)/(2*q^(1/4)).

Terms

a(0) =1a(1) =1a(2) =1a(3) =3a(4) =2a(5) =3a(6) =6a(7) =5a(8) =4a(9) =10a(10) =10a(11) =7a(12) =18a(13) =14a(14) =12a(15) =27a(16) =24a(17) =16a(18) =36a(19) =34a(20) =25a(21) =57a(22) =45a(23) =36a(24) =73a(25) =65a(26) =44a(27) =94a(28) =82a(29) =56