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.

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.

Terms

    a(0) =0a(1) =200a(2) =405000a(3) =34009632a(4) =828786600a(5) =10057575600a(6) =78117080400a(7) =444684760200

External references