Expansion of (theta_3(z)*theta_3(13z)+theta_2(z)*theta_2(13z))^4.

Terms

a(0) =1a(1) =0a(2) =8a(3) =0a(4) =24a(5) =0a(6) =32a(7) =16a(8) =24a(9) =96a(10) =48a(11) =208a(12) =96a(13) =224a(14) =160a(15) =288a(16) =408a(17) =512a(18) =680a(19) =496a(20) =912a(21) =736a(22) =1344a(23) =1280a(24) =1248a(25) =1376a(26) =1464a(27) =2208a(28) =2816a(29) =2528