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A023932 Theta series of A*_20 lattice. 0

%I

%S 1,0,0,0,0,0,0,0,0,0,42,0,0,0,0,0,0,0,0,420,0,420,0,0,0,0,0,2660,0,0,

%T 0,7980,0,0,11970,0,0,0,0,0,88620,0,35910,0,0,108528,0,0,204330,

%U 232560,0,0,814800,0,587860,1364580,0,0,0,0,0,3319680,0,1093260,0

%N Theta series of A*_20 lattice.

%D J. H. Conway and N. J. A. Sloane, "Sphere Packings, Lattices and Groups", Springer-Verlag, p. 114.

%H Kok Seng Chua, <a href="https://doi.org/10.1090/S0002-9939-01-06080-4">The Root Lattice A*n and Ramanujan's Circular Summation of Theta Functions</a>, Proc. Amer. Math. Soc. 130 (2002), 1-8.

%K nonn

%O 0,11

%A _N. J. A. Sloane_.

%E More terms from _Sean A. Irvine_, Jul 15 2020

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Last modified September 19 13:31 EDT 2021. Contains 347563 sequences. (Running on oeis4.)