|
Search: id:A090769
|
|
|
| A090769 |
|
7^(n^2+2n+1)*Product_{j=1..n} (49^j-1). |
|
+0
7
|
|
| 7, 115248, 4648735526400, 450407556363158605209600, 104778523164913973815626804401602560000, 58523610551335889301209607995669952696063684472995840000, 78484177614161178233131678359243733693084949841898468389173730723495936000000, 252711655239728880943018718373465881336679551349902568778399448766444479481704737212965012373504000000
(list; graph; listen)
|
|
|
OFFSET
|
0,1
|
|
|
COMMENT
|
The order of the p-Clifford group for an odd prime p is a*p^(n^2+2n+1)*Product_{j=1..n} (p^(2*j)-1), where a = gcd(p+1,4).
|
|
LINKS
|
G. Nebe, E. M. Rains and N. J. A. Sloane, Self-Dual Codes and Invariant Theory, Springer, Berlin, 2006.
|
|
CROSSREFS
|
Cf. A001309, A003956.
Cf. A092299 and A092301 (p=3), A092300 and A089989 (p=5), A090768 and A090769 (p=7), A090770 (p=2, although this is the wrong formula in that case).
Sequence in context: A123062 A110719 A122000 this_sequence A013842 A145322 A145335
Adjacent sequences: A090766 A090767 A090768 this_sequence A090770 A090771 A090772
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
njas, Feb 10 2004
|
|
|
Search completed in 0.002 seconds
|
