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A023934 Theta series of A*_22 lattice. 0
1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 46, 0, 0, 0, 0, 0, 0, 0, 0, 0, 506, 0, 506, 0, 0, 0, 0, 0, 0, 3542, 0, 0, 0, 10626, 0, 0, 0, 17710, 0, 0, 0, 0, 0, 70886, 67298, 53130, 0, 0, 0, 0, 201894, 0, 337502, 0, 0, 490314, 673992, 0, 0, 980628, 1221990, 0, 1634380, 0 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,12

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..64.

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: A145319 A089626 A110479 * A022076 A055766 A267319

Adjacent sequences:  A023931 A023932 A023933 * A023935 A023936 A023937

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 30 07:58 EDT 2021. Contains 346348 sequences. (Running on oeis4.)