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A079145 Number of labeled semitransitive orders on n elements: (1+3)-free posets. 1
1, 3, 19, 195, 2791, 51423, 1167979, 32067675, 1064281951 (list; graph; refs; listen; history; internal format)
OFFSET

1,2

CROSSREFS

Cf. A079146 (unlabeled semitransitive orders).

Sequence in context: A108292 A053554 A048172 * A000763 A001832 A195511

Adjacent sequences:  A079142 A079143 A079144 * A079146 A079147 A079148

KEYWORD

nonn,more

AUTHOR

Detlef Pauly (dettodet(AT)yahoo.de), Dec 27 2002

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Last modified February 16 12:15 EST 2012. Contains 205909 sequences.