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A058115 Number of asymmetric idempotent semigroups of order n. 2

%I

%S 1,1,1,3,12,68,502,4158

%N Number of asymmetric idempotent semigroups of order n.

%H <a href="/index/Se#semigroups">Index entries for sequences related to semigroups</a>

%Y Main diagonal of A058113.

%K nonn,hard

%O 0,4

%A _Christian G. Bower_, Nov 09 2000

%E Updated Feb 19 2001

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Last modified August 15 12:09 EDT 2022. Contains 356145 sequences. (Running on oeis4.)