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A020564
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Number of cyclic oriented multigraphs on n labeled arcs (without loops).
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0
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1, 1, 7, 88, 1686, 44746, 1550780, 67381560, 3562868722, 224113484498, 16473080538422, 1394549071911392, 134354292707375708, 14583554691197056644, 1768268298908733087440, 237735747822259634293456, 35212913676142942896961116
(list;
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listen;
history;
text;
internal format)
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OFFSET
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0,3
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LINKS
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FORMULA
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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