A029595 - OEIS

%I #14 Jul 17 2014 12:28:39

%S 1,2,2,8,10,0,4,12,10,6,2,16,16,8,4,4,26,4,10,32,0,8,12,12,20,2,4,32,

%T 36,8,0,24,26,8,12,8,30,16,4,24,10,8,8,56,32,0,20,12,32,14,2,48,40,8,

%U 16,0,20,16,20,32,12,16,8,36,58,4,8,72,20,8,0,24,50,20,12,8,64

%N Theta series of quadratic form (or lattice) with Gram matrix [ 1, 0, 0; 0, 2, 1; 0, 1, 3 ].

%C This is the digonal C lattice (the classical holotype) of dimension 3.

%H John Cannon, <a href="/A029595/b029595.txt">Table of n, a(n) for n = 0..10000</a>

%H G. Nebe and N. J. A. Sloane, <a href="http://www.math.rwth-aachen.de/~Gabriele.Nebe/LATTICES/digonalC.html">Home page for this lattice</a>

%e 1 + 2*q + 2*q^2 + 8*q^3 + 10*q^4 + 4*q^6 + 12*q^7 + 10*q^8 + 6*q^9 + 2*q^10 + ...

%K nonn

%O 0,2

%A _N. J. A. Sloane_.