Theta series of quadratic form with Gram matrix [ 2, 1, 0; 1, 4, 1; 0, 1, 2 ].

Terms

a(0) =1a(1) =4a(2) =12a(3) =0a(4) =20a(5) =8a(6) =10a(7) =8a(8) =28a(9) =4a(10) =32a(11) =16a(12) =0a(13) =8a(14) =40a(15) =8a(16) =52a(17) =8a(18) =12a(19) =16a(20) =40a(21) =0a(22) =40a(23) =16a(24) =26a(25) =20a(26) =64a(27) =0a(28) =40a(29) =24