Search: id:A139621
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%I A139621
%S A139621 1,1,1,4,3,1,8,15,8,1,16
%N A139621 Table read by rows: T(n,k) is the number of connected directed multigraphs 
               with loops and no vertex of degree 0, with n arcs and k vertices.
%C A139621 Length of the n^th row: n+1.
%C A139621 T(n,1) = 1, T(n,2) = T139654(n,2) - floor(n/2), T(n,n+1) = A022017(n).
%C A139621 Row sums: A139626.
%H A139621 B. Jubin, <a href="http://math.berkeley.edu/~jubin/oeis.html">Sequences 
               contributed to the OEIS</a>.
%Y A139621 Cf. A136564, A139622.
%Y A139621 Sequence in context: A128007 A098458 A165914 this_sequence A165732 A123160 
               A039758
%Y A139621 Adjacent sequences: A139618 A139619 A139620 this_sequence A139622 A139623 
               A139624
%K A139621 nonn
%O A139621 1,4
%A A139621 Benoit Jubin (benoit_jubin(AT)yahoo.fr), May 01 2008

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