Theta series of b.c.c. lattice with respect to long edge.

Terms

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