%I A139628
%S A139628 1,2,9,33
%N A139628 Row sums of A139623, number of directed multigraphs with loops and no 
               vertex of degree 0, with n arcs, which are transitive (the existence 
               of a path between two points implies the existence of an arc between 
               those two points).
%Y A139628 Cf. A139629, A139630.
%Y A139628 Sequence in context: A110376 A036505 A056916 this_sequence A123142 A122097 
               A073400
%Y A139628 Adjacent sequences: A139625 A139626 A139627 this_sequence A139629 A139630 
               A139631
%K A139628 more,nonn
%O A139628 0,2
%A A139628 Benoit Jubin (benoit_jubin(AT)yahoo.fr), May 01 2008