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A139624 Table read by rows: T(n,k) is the number of connected directed multigraphs with loops and no vertex of degree 0, with n arcs and k vertices, which are transitive (the existence of a path between two points implies the existence of an arc between those two points). +0
5
1, 1, 1, 3, 2, 1, 6, 7, 3, 1, 11 (list; graph; listen)
OFFSET

1,4

COMMENT

Length of the n^th row: n+1.

T(n,1) = 1

Row sums: A139629.

CROSSREFS

Cf. A139623, A139625.

Adjacent sequences: A139621 A139622 A139623 this_sequence A139625 A139626 A139627

Sequence in context: A113655 A114155 A079513 this_sequence A132276 A114586 A052174

KEYWORD

nonn

AUTHOR

Benoit Jubin (benoit_jubin(AT)yahoo.fr), May 01 2008

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Last modified November 3 12:59 EST 2009. Contains 165766 sequences.


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