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%I #2 Mar 31 2012 10:31:22
%S 1,2,6,17
%N Row sums of A139624, number of connected 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 Cf. A139628, A139630.
%K more,nonn
%O 0,2
%A _Benoit Jubin_, May 01 2008