Expansion of (theta_3(z)*theta_3(4z)+theta_2(z)*theta_2(4z))^2.

Terms

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