Expansion of (theta_3(z)*theta_3(2z)+theta_2(z)*theta_2(2z))^2.

Terms

a(0) =1a(1) =0a(2) =0a(3) =8a(4) =4a(5) =0a(6) =16a(7) =16a(8) =8a(9) =0a(10) =0a(11) =24a(12) =16a(13) =0a(14) =32a(15) =48a(16) =24a(17) =0a(18) =0a(19) =40a(20) =24a(21) =0a(22) =48a(23) =48a(24) =32a(25) =0a(26) =0a(27) =80a(28) =32a(29) =0