Theta series of quadratic form (or lattice) with Gram matrix [ 2, 1, 0; 1, 3, 1; 0, 1, 2 ].

Terms

a(0) =1a(1) =0a(2) =4a(3) =8a(4) =4a(5) =0a(6) =0a(7) =16a(8) =6a(9) =0a(10) =16a(11) =8a(12) =8a(13) =0a(14) =0a(15) =16a(16) =12a(17) =0a(18) =20a(19) =24a(20) =8a(21) =0a(22) =0a(23) =16a(24) =8a(25) =0a(26) =16a(27) =32a(28) =16a(29) =0