Theta series of quadratic form with Gram matrix [ 3, 1, -1; 1, 4, 1; -1, 1, 3 ].

Terms

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