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

Terms

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