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

Terms

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