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A219889
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Number of directed 2-regular graphs on n nodes.
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12
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1, 2, 5, 23, 92, 624, 5021, 47034, 494320, 5719769, 71971687
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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3,2
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LINKS
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CROSSREFS
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Cf. A096368, A219890, A219891, A219892, A219893, A307155 (connected, inverse Euler Trans.), A007107 (labeled), A306827 (multiedges, connected), A002865 (directed 1-regular unlabeled no loops), A005641 (loops allowed)
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KEYWORD
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nonn,more
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AUTHOR
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STATUS
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approved
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