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

Terms

a(0) =1a(1) =8a(2) =12a(3) =6a(4) =20a(5) =24a(6) =0a(7) =24a(8) =36a(9) =8a(10) =24a(11) =24a(12) =18a(13) =48a(14) =24a(15) =0a(16) =44a(17) =48a(18) =12a(19) =24a(20) =48a(21) =24a(22) =48a(23) =48a(24) =0a(25) =56a(26) =24a(27) =6a(28) =72a(29) =72