Product t2(q^d); d | 42, 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) =3a(8) =4a(9) =8a(10) =7a(11) =5a(12) =12a(13) =8a(14) =6a(15) =15a(16) =14a(17) =11a(18) =17a(19) =18a(20) =13a(21) =27a(22) =23a(23) =24a(24) =33a(25) =26a(26) =32a(27) =40a(28) =36a(29) =35