A023930 Theta series of A*_18 lattice.

1, 0, 0, 0, 0, 0, 0, 0, 0, 38, 0, 0, 0, 0, 0, 0, 0, 342, 0, 342, 0, 0, 0, 0, 1938, 0, 0, 0, 5814, 0, 7752, 0, 0, 0, 0, 23256, 31046, 0, 23256, 54264, 0, 0, 100776, 116964, 151164, 184756, 0, 233244, 0, 331398, 0, 0, 0, 0, 736440, 825588, 0, 548454, 1325592, 0

Offset

0,10

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..59.

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: A345467 A329226 A171407 * A022072 A351221 A154229

Adjacent sequences: A023927 A023928 A023929 * A023931 A023932 A023933

Keyword

nonn

Author

N. J. A. Sloane.

Extensions

More terms from Sean A. Irvine, Jul 15 2020

Status

approved