Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).
%I #8 Mar 30 2012 16:47:15
%S 1,0,4,6,2,6,2,6,10,2,4,10,12,6,6,6,6,10,10,10,16,6,2,12,12,4,8,22,12,
%T 12,8,8,22,10,4,22,10,0,16,10,12,18,10,14,20,16,8,26,20,6,16,14,16,10,
%U 14,10,16,10,12,28,12,8,28,28,10,16,10,16,36,8,8,18,30,18,0,26,20,22,12,6,36
%N Theta series of quadratic form with Gram matrix [ 4, 1, 0; 1, 4, 2; 0, 2, 6 ].
%C This is the triclinic P lattice (the even holotype) of dimension 3.
%H John Cannon, <a href="/A029677/b029677.txt">Table of n, a(n) for n = 0..5000</a>
%H G. Nebe and N. J. A. Sloane, <a href="http://www.math.rwth-aachen.de/~Gabriele.Nebe/LATTICES/triclinicPe.html">Home page for this lattice</a>
%e 1 + 4*q^4 + 6*q^6 + 2*q^8 + 6*q^10 + 2*q^12 + 6*q^14 + 10*q^16 + 2*q^18 + 4*q^20 + ...
%K nonn
%O 0,3
%A _N. J. A. Sloane_.