Theta series of quadratic form with Gram matrix [ 2, 1, 0; 1, 4, 1; 0, 1, 4 ].

Terms

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