Product t2(q^d); d | 30, where t2 = theta2(q)/(2*q^(1/4)).

Terms

a(0) =1a(1) =1a(2) =1a(3) =3a(4) =1a(5) =3a(6) =6a(7) =3a(8) =6a(9) =8a(10) =7a(11) =10a(12) =13a(13) =9a(14) =11a(15) =20a(16) =18a(17) =19a(18) =27a(19) =19a(20) =27a(21) =45a(22) =27a(23) =35a(24) =47a(25) =39a(26) =54a(27) =61a(28) =45a(29) =48