A027825 If there were a unimodular 25-dimensional lattice with minimal norm 3, it would have this as the theta series of its shadow. Unfortunately, no such lattice exists.

0, 200, 405000, 34009632, 828786600, 10057575600, 78117080400, 444684760200, 2013684539760, 7650742653000, 25296927545000, 74726358240600, 201078440944200

Offset

0,2

Links

Table of n, a(n) for n=0..12.

E. M. Rains and N. J. A. Sloane, The Shadow Theory of Modular and Unimodular Lattices, J. Number Theory, 73 (1998), 359-389.

Example

200*q^(9/4)+ 405000*q^(17/4)+ 34009632*q^(25/4)+...

Crossrefs

Sequence in context: A278191 A248453 A035835 * A098963 A107843 A296022

Adjacent sequences: A027822 A027823 A027824 * A027826 A027827 A027828

Keyword

nonn

Author

N. J. A. Sloane, E. M. Rains

Status

approved