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A350492
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Number of unlabeled acyclic digraphs with n arcs and a global source and sink.
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4
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1, 1, 1, 2, 5, 14, 44, 153, 584, 2414, 10732, 50909, 256198, 1360645, 7593530, 44366458, 270517289, 1716555943, 11308051214, 77170484915, 544525867544, 3965944595335, 29769162604337, 229970873746105, 1826057472681595, 14886348784740516
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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0,4
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LINKS
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PROG
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(PARI) A350492seq(20) \\ See PARI link in A122078 for program code.
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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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