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

Terms

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