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A350415
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Number of acyclic digraphs on n unlabeled nodes with a global source (or sink).
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10
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1, 1, 3, 16, 164, 3341, 138101, 11578037, 1961162564, 668678055847, 457751797355605, 628137837068751147, 1726130748679532455689, 9493834992383031007906911, 104476428350838383854529661007, 2299979227717819421763629684068904
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OFFSET
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1,3
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COMMENTS
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A local source (also called an out-node) is a node whose in-degree is zero. In the case of an acyclic digraph with only one local source, the source is also a global source.
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LINKS
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PROG
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(PARI) A350415seq(16) \\ 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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