

A079183


Number of isomorphism classes of noncommutative closed binary operations (groupoids) on a set of order n.


4




OFFSET

1,2


COMMENTS

Each a(n) is equal to the sum of the elements in row n of A079184.


LINKS



CROSSREFS



KEYWORD

nonn


AUTHOR

Christian van den Bosch (cjb(AT)cjb.ie), Jan 03 2003


EXTENSIONS



STATUS

approved



