[GAP Forum] semigroup of some order

[Marco Costantini]

Dear  jalal molav,
there is some information and some links at 
http://mathworld.wolfram.com/Semigroup.html : "The numbers of nonisomorphic 
semigroups of orders 1, 2, ... are 1, 5, 24, 188, 1915, ... (Sloane's 
A027851)."
Best regards,
Marco Costantini

On Wednesday 02 March 2005 13:59, jalal molavi wrote:
> Is there any classification about semigroup such as group.
> in the other hand how many semigroups are there of size n
> where n is natural number.
> i need all semigroups of size less than 10.
> if any one have usefull information i am very thankful to know that.