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 A029677 Theta series of quadratic form with Gram matrix [ 4, 1, 0; 1, 4, 2; 0, 2, 6 ]. 1

%I

%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_.

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Last modified March 26 06:47 EDT 2023. Contains 361529 sequences. (Running on oeis4.)