|
| |
|
|
A256038
|
|
Triangle read by rows: number of R-class idempotent basis elements of rank k in Brauer monoid B_n.
|
|
0
|
|
|
|
1, 0, 1, 0, 0, 1, 0, 2, 0, 1, 0, 0, 4, 0, 1, 0, 8, 0, 6, 0, 1, 0, 0, 24, 0, 8, 0, 1, 0, 48, 0, 48, 0, 10, 0, 1, 0, 0, 192, 0, 80, 0, 12, 0, 1, 0, 384, 0, 480, 0, 120, 0, 14, 0, 1, 0, 0, 1920, 0, 168, 0, 195, 0, 16, 0, 1
(list;
table;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
|
OFFSET
|
0,8
|
|
|
LINKS
|
Table of n, a(n) for n=0..65.
I. Dolinka, J. East, A. Evangelou, D. FitzGerald, N. Ham, et al., Enumeration of idempotents in diagram semigroups and algebras, arXiv preprint arXiv:1408.2021, 2014.
|
|
|
EXAMPLE
|
Triangle begins:
1,
0, 1,
0, 0, 1,
0, 2, 0, 1,
0, 0, 4, 0, 1,
0, 8, 0, 6, 0, 1,
0, 0, 24, 0, 8, 0, 1,
0, 48, 0, 48, 0, 10, 0, 1,
0, 0, 192, 0, 80, 0, 12, 0, 1,
0, 384, 0, 480, 0, 120, 0, 14, 0, 1,
0, 0, 1920, 0, 168, 0, 195, 0, 16, 0, 1,
...
|
|
|
CROSSREFS
|
Sequence in context: A036853 A036852 A260941 * A050327 A075120 A111593
Adjacent sequences: A256035 A256036 A256037 * A256039 A256040 A256041
|
|
|
KEYWORD
|
nonn,tabl
|
|
|
AUTHOR
|
N. J. A. Sloane, Mar 14 2015
|
|
|
STATUS
|
approved
|
| |
|
|
