A110972 Number of vectors in Barnes-Wall lattice BW_{2^n} with twice the minimal norm.

4, 24, 2160, 522720, 4844836800

Offset

1,1

Comments

Dividing term n by 2^{n+1} gives A110973.

Links

Table of n, a(n) for n=1..5.

N. Heninger, E. M. Rains and N. J. A. Sloane, On the Integrality of n-th Roots of Generating Functions, J. Combinatorial Theory, Series A, 113 (2006), 1732-1745.

Index entries for sequences related to Barnes-Wall lattices

Crossrefs

Sequence in context: A303131 A012124 A108185 * A065711 A279240 A279110

Adjacent sequences: A110969 A110970 A110971 * A110973 A110974 A110975

Keyword

hard,nonn

Author

Eric Rains (rains(AT)caltech.edu) and N. J. A. Sloane, Sep 27 2005

Status

approved