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A139627 Row sums of A139622, number of strongly connected directed multigraphs with loops and no vertex of degree 0, with n arcs. 3
1, 1, 2, 4 (list; graph; refs; listen; history; internal format)
OFFSET

0,3

CROSSREFS

Cf. A052171, A139626.

Sequence in context: A120313 A176649 A082871 * A166926 A028573 A138758

Adjacent sequences:  A139624 A139625 A139626 * A139628 A139629 A139630

KEYWORD

more,nonn

AUTHOR

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

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Last modified February 13 08:12 EST 2012. Contains 205451 sequences.