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A023928 Theta series of A*_16 lattice. 0
1, 0, 0, 0, 0, 0, 0, 0, 34, 0, 0, 0, 0, 0, 0, 272, 0, 272, 0, 0, 0, 1360, 0, 0, 0, 4080, 4760, 0, 0, 0, 12376, 0, 19074, 24752, 14280, 38896, 48620, 0, 62424, 0, 0, 0, 124304, 152592, 0, 0, 0, 291312, 0, 379440, 450840, 251600, 586092, 661232, 0, 873936, 0, 0 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,9

REFERENCES

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

LINKS

Table of n, a(n) for n=0..57.

Kok Seng Chua, The Root Lattice A*n and Ramanujan's Circular Summation of Theta Functions, Proc. Amer. Math. Soc. 130 (2002), 1-8.

CROSSREFS

Sequence in context: A300614 A171705 A228426 * A022070 A123301 A328913

Adjacent sequences:  A023925 A023926 A023927 * A023929 A023930 A023931

KEYWORD

nonn

AUTHOR

N. J. A. Sloane.

EXTENSIONS

More terms from Sean A. Irvine, Jul 15 2020

STATUS

approved

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Last modified July 24 20:26 EDT 2021. Contains 346273 sequences. (Running on oeis4.)