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

Terms

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