Expansion of (theta_3(z)*theta_3(15z) + theta_2(z)*theta_2(15z))^3.

Terms

a(0) =1a(1) =6a(2) =12a(3) =8a(4) =18a(5) =72a(6) =84a(7) =48a(8) =156a(9) =222a(10) =180a(11) =360a(12) =312a(13) =168a(14) =720a(15) =342a(16) =534a(17) =552a(18) =628a(19) =444a(20) =1272a(21) =1008a(22) =600a(23) =1128a(24) =1752a(25) =894a(26) =2520a(27) =1040a(28) =1008a(29) =2520