Expansion of (theta_3(z)*theta_3(3z)*theta_3(9z)+theta_2(z)*theta_2(3z)*theta_2(9z))^4.

Terms

a(0) =1a(1) =0a(2) =0a(3) =0a(4) =8a(5) =0a(6) =0a(7) =0a(8) =24a(9) =0a(10) =0a(11) =0a(12) =40a(13) =32a(14) =0a(15) =0a(16) =88a(17) =192a(18) =0a(19) =0a(20) =240a(21) =416a(22) =0a(23) =0a(24) =376a(25) =640a(26) =384a(27) =0a(28) =448a(29) =1728