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Search: id:A052171
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| A052171 |
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Number of directed multigraphs with loops on infinite set of nodes with n arcs. |
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+0
7
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| 1, 2, 11, 52, 296, 1724, 11060, 74527, 533046, 3999187, 31412182, 257150093, 2188063401, 19299062896, 176059781439, 1657961491087
(list; graph; listen)
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OFFSET
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0,2
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COMMENT
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Row sums of A136564, limiting values of A138107. - Benoit Jubin (benoit_jubin(AT)yahoo.fr), May 13 2008
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LINKS
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J.-C. Novelli, J.-Y. Thibon and N. M. Thiery, Algebres de Hopf de graphes, C.R. Acad. Sci. Paris (Comptes Rendus Mathematique), 339 (2004), 607-610.
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CROSSREFS
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Cf. A050535, A007717, A005993, A050927, A050929.
Cf. A104209.
Sequence in context: A110308 A027201 A026933 this_sequence A030281 A063767 A161559
Adjacent sequences: A052168 A052169 A052170 this_sequence A052172 A052173 A052174
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KEYWORD
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more,nonn
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AUTHOR
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Vladeta Jovovic (vladeta(AT)eunet.rs), Jan 26 2000
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