|
Search: id:A014115
|
|
|
| A014115 |
|
Order of a certain Clifford group in dimension 2^n (the automorphism group of the Barnes-Wall lattice for n != 3). |
|
+0
4
|
|
| 2, 8, 1152, 2580480, 89181388800, 48126558103142400, 409825748158189771161600, 55428899652335313894424707072000
(list; graph; listen)
|
|
|
OFFSET
|
0,1
|
|
|
REFERENCES
|
J. H. Conway and N. J. A. Sloane, "Sphere Packings, Lattices and Groups", Springer-Verlag, p. 129.
G. E. Wall, On the Clifford collineation..., Nagoya Math. J., 21 (1962), pp. 199-222.
|
|
LINKS
|
A. R. Calderbank, E. M. Rains, P. W. Shor and N. J. A. Sloane, Quantum error correction via codes over GF(4), IEEE Trans. Inform. Theory, 44 (1998), 1369-1387.
Index entries for sequences related to Barnes-Wall lattices
|
|
MAPLE
|
2^(n^2+n+1) * (2^n - 1) * product('2^(2*i)-1', 'i'=1..n-1);
|
|
CROSSREFS
|
Agrees with A014116 except at n=3. Cf. A001309, A003956.
Adjacent sequences: A014112 A014113 A014114 this_sequence A014116 A014117 A014118
Sequence in context: A061591 A103085 A084148 this_sequence A014116 A121015 A073630
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
njas
|
|
|
Search completed in 0.002 seconds
|
