|
| |
|
|
A001440
|
|
Number of symmetric Costas arrays of order n that are inequivalent under dihedral group.
|
|
3
|
|
|
|
1, 1, 1, 1, 2, 5, 10, 9, 10, 14, 18, 17, 25, 23, 31, 20, 19, 10, 6, 4, 8, 5, 10, 0, 2, 2, 7, 0, 5, 4, 0, 0
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
|
OFFSET
|
1,5
|
|
|
REFERENCES
|
CRC Handbook of Combinatorial Designs, C. Colbourn and J. Dinitz, Editors, 1996, IV.7: Costas Arrays by Herbert Taylor (IV.7.6, page 259, Table 2.29).
|
|
|
LINKS
|
Table of n, a(n) for n=1..32.
|
|
|
CROSSREFS
|
Cf. A008404, A001441, A001442.
Sequence in context: A126842 A154680 A140469 * A258779 A097378 A078310
Adjacent sequences: A001437 A001438 A001439 * A001441 A001442 A001443
|
|
|
KEYWORD
|
nonn,hard,more
|
|
|
AUTHOR
|
N. J. A. Sloane.
|
|
|
STATUS
|
approved
|
| |
|
|
