%I A029673
%S A029673 1,2,10,4,10,2,16,4,26,10,0,12,20,4,36,0,26,12,30,4,10,8,32,20,32,2,40,
%T A029673 16,20,20,12,8,58,8,20,0,50,12,64,16,0,16,40,12,60,6,36,20,52,14,10,16,
%U A029673 20,28,64,4,84,16,40,20,0,12,72,20,58,0,40,12,60,16,16,32,78,12,80,4,20
%N A029673 Theta series of quadratic form with Gram matrix [ 2, 0, 1; 0, 4, 2; 1, 
               2, 4 ].
%C A029673 Alternatively, this is the quadratic form with Gram matrix [ 2, 1, 1; 
               1, 4, 2; 1, 2, 4 ].
%C A029673 This is the digonal I lattice (the even holotype) of dimension 3.
%H A029673 John Cannon, <a href="b029673.txt">Table of n, a(n) for n = 0..5000</
               a>
%H A029673 G. Nebe and N. J. A. Sloane, <a href="http://www.research.att.com/~njas/
               lattices/digonalIe.html">Home page for this lattice</a>
%e A029673 1 + 2*q^2 + 10*q^4 + 4*q^6 + 10*q^8 + 2*q^10 + 16*q^12 + 4*q^14 + 26*q^16 
               + ...
%Y A029673 Sequence in context: A120862 A153273 A102512 this_sequence A054790 A140393 
               A000170
%Y A029673 Adjacent sequences: A029670 A029671 A029672 this_sequence A029674 A029675 
               A029676
%K A029673 nonn,easy
%O A029673 0,2
%A A029673 N. J. A. Sloane (njas(AT)research.att.com).