Search: id:A058108
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%I A058108
%S A058108 1,2,3,5,9,10,20,50,72,46,171,309,590,594,251,5284,2806,5422,7772,
%T A058108 5668,1682,1224331,58583,61323,101539,109107,59576,13213
%N A058108 Triangle read by rows: semigroups of order n with k idempotents.
%H A058108 <a href="Sindx_Se.html#semigroups">Index entries for sequences related 
               to semigroups</a>
%e A058108 1; 2,3; 5,9,10; 20,50,72,46; 171,309,590,594,251; ...
%Y A058108 Row sums give A027851. Main diagonal: A058112. Columns 1-3: A058109-A058111.
%Y A058108 Sequence in context: A057254 A057242 A090845 this_sequence A056144 A078645 
               A067139
%Y A058108 Adjacent sequences: A058105 A058106 A058107 this_sequence A058109 A058110 
               A058111
%K A058108 nonn,tabl,hard
%O A058108 1,2
%A A058108 Christian G. Bower (bowerc(AT)usa.net), Nov 09 2000
%E A058108 Updated Feb 19 2001

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