Product t2(q^d); d | 26, where t2 = theta2(q)/(2*q^(1/4)).

Terms

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