Expansion of (theta_3(z)*theta_3(15z) + theta_2(z)*theta_2(15z))^2.

Terms

a(0) =1a(1) =4a(2) =4a(3) =0a(4) =12a(5) =24a(6) =8a(7) =16a(8) =36a(9) =4a(10) =64a(11) =16a(12) =16a(13) =24a(14) =48a(15) =20a(16) =60a(17) =40a(18) =4a(19) =48a(20) =152a(21) =16a(22) =80a(23) =48a(24) =24a(25) =124a(26) =88a(27) =0a(28) =112a(29) =56