|
Search: id:A028309
|
|
|
| A028309 |
|
Molien series for ring of symmetrized weight enumerators of self-dual codes (with respect to Euclidean inner product) of length n over GF(4). |
|
+0
1
|
|
| 1, 1, 2, 3, 5, 6, 9, 11, 15, 18, 23, 27, 33, 38, 45, 51, 59, 66, 75, 83, 93, 102, 113, 123, 135, 146, 159, 171, 185, 198, 213, 227, 243, 258, 275, 291, 309, 326, 345, 363, 383, 402, 423, 443, 465, 486, 509, 531, 555
(list; graph; listen)
|
|
|
OFFSET
|
0,3
|
|
|
LINKS
|
G. Nebe, E. M. Rains and N. J. A. Sloane, Self-Dual Codes and Invariant Theory, Springer, Berlin, 2006.
E. M. Rains and N. J. A. Sloane, Self-dual codes, pp. 177-294 of Handbook of Coding Theory, Elsevier, 1998 (Abstract, pdf, ps).
Index entries for Molien series
|
|
MAPLE
|
(1+x^8+x^16)/((1-x^2)*(1-x^4)*(1-x^6));
|
|
CROSSREFS
|
Sequence in context: A070757 A123399 A104738 this_sequence A026810 A001400 A008773
Adjacent sequences: A028306 A028307 A028308 this_sequence A028310 A028311 A028312
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
njas
|
|
|
Search completed in 0.002 seconds
|
