|
| |
|
|
A038021
|
|
Triangle: T(n,k), k<=n: commutative groupoids with n elements and k idempotents.
|
|
3
| |
|
|
1, 0, 1, 1, 2, 1, 38, 57, 27, 7, 13872, 18544, 9280, 2080, 192, 83360520, 104208775, 52110500, 13035000, 1632750, 82355
(list; table; graph; refs; listen; history; internal format)
|
| |
| |
|
|
