%I A140189
%S A140189 1,1,2,3,7,9,16,22,42,57,90,124,204,275,413,562,866,1161,1685,2264,3308,
%T A140189 4407
%N A140189 Number of groupoids (categories all of whose morphisms are invertible) 
               with n morphisms.
%C A140189 Row sums of A140188 (see comments and formula there).
%Y A140189 Cf. A140185, A140188.
%Y A140189 Sequence in context: A135369 A109660 A075855 this_sequence A165803 A007649 
               A046152
%Y A140189 Adjacent sequences: A140186 A140187 A140188 this_sequence A140190 A140191 
               A140192
%K A140189 nonn
%O A140189 0,3
%A A140189 Benoit Jubin (benoit_jubin(AT)yahoo.fr), May 12 2008