Coefficients in expansion of theta_3(q) * theta_3(q^7) in powers of q.

Terms

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