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

Terms

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