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A029676 Theta series of quadratic form with Gram matrix [ 3, 1, 0; 1, 3, 1; 0, 1, 4 ]. 1

%I

%S 1,0,0,4,4,2,2,4,2,2,4,6,6,2,2,2,12,2,0,14,6,2,2,4,10,6,2,14,8,0,2,12,

%T 4,2,8,8,14,4,4,8,14,2,4,14,12,8,6,2,12,8,2,16,10,2,6,16,10,0,0,16,12,

%U 10,2,12,24,2,6,20,10,6,6,8,8,4,4,24,30,2,6,14,14,8,8,12,10,2

%N Theta series of quadratic form with Gram matrix [ 3, 1, 0; 1, 3, 1; 0, 1, 4 ].

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

%H John Cannon, <a href="/A029676/b029676.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/triclinicP.html">Home page for this lattice</a>

%e 1 + 4*q^3 + 4*q^4 + 2*q^5 + 2*q^6 + 4*q^7 + 2*q^8 + 2*q^9 + 4*q^10 + 6*q^11 + ...

%K nonn

%O 0,4

%A _N. J. A. Sloane_.

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Last modified February 1 12:28 EST 2023. Contains 359993 sequences. (Running on oeis4.)