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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
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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 March 29 02:23 EDT 2024. Contains 371264 sequences. (Running on oeis4.)