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%I #5 Mar 30 2012 17:37:11
%S 3,9,50,309,2806,58583
%N Semigroups of order n with 2 idempotents.
%H <a href="/index/Se#semigroups">Index entries for sequences related to semigroups</a>
%Y Column 2 of A058108.
%K nonn,hard
%O 2,1
%A _Christian G. Bower_, Nov 09 2000
%E Updated Feb 19 2001