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A110972 Number of vectors in Barnes-Wall lattice BW_{2^n} with twice the minimal norm. 0
4, 24, 2160, 522720, 4844836800 (list; graph; refs; listen; history; text; internal format)
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

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Last modified June 19 16:48 EDT 2019. Contains 324222 sequences. (Running on oeis4.)