|
|
A027851
|
|
Number of nonisomorphic semigroups of order n.
|
|
25
|
|
|
|
OFFSET
|
0,3
|
|
LINKS
|
Arman Shamsgovara, Enumerating, Cataloguing and Classifying All Quantales on up to Nine Elements, In: Glück, R., Santocanale, L., and Winter, M. (eds), Relational and Algebraic Methods in Computer Science (RAMiCS 2023) Lecture Notes in Computer Science, Springer, Cham, Vol. 13896.
|
|
FORMULA
|
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn,hard,nice
|
|
AUTHOR
|
|
|
EXTENSIONS
|
|
|
STATUS
|
approved
|
|
|
|