Expansion of (theta_3(z)*theta_3(18z)+theta_2(z)*theta_2(18z))^3.

Terms

a(0) =1a(1) =0a(2) =0a(3) =0a(4) =6a(5) =0a(6) =0a(7) =0a(8) =12a(9) =0a(10) =0a(11) =0a(12) =8a(13) =0a(14) =0a(15) =0a(16) =6a(17) =0a(18) =0a(19) =12a(20) =24a(21) =0a(22) =0a(23) =48a(24) =24a(25) =0a(26) =0a(27) =60a(28) =0a(29) =0