%I A052171
%S A052171 1,2,11,52,296,1724,11060,74527,533046,3999187,31412182,257150093,
%T A052171 2188063401,19299062896,176059781439,1657961491087
%N A052171 Number of directed multigraphs with loops on infinite set of nodes with 
               n arcs.
%C A052171 Row sums of A136564, limiting values of A138107. - Benoit Jubin (benoit_jubin(AT)yahoo.fr), 
               May 13 2008
%H A052171 J.-C. Novelli, J.-Y. Thibon and N. M. Thiery, <a href="http://www-igm.univ-mlv.fr/
               ~jyt/articles.html">Algebres de Hopf de graphes</a>, C.R. Acad. Sci. 
               Paris (Comptes Rendus Mathematique), 339 (2004), 607-610.
%Y A052171 Cf. A050535, A007717, A005993, A050927, A050929.
%Y A052171 Cf. A104209.
%Y A052171 Sequence in context: A110308 A027201 A026933 this_sequence A030281 A063767 
               A161559
%Y A052171 Adjacent sequences: A052168 A052169 A052170 this_sequence A052172 A052173 
               A052174
%K A052171 more,nonn
%O A052171 0,2
%A A052171 Vladeta Jovovic (vladeta(AT)eunet.rs), Jan 26 2000