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A139630 Row sums of A139625, number of strongly connected directed multigraphs with loops and no vertex of degree 0, with n arcs, which are transitive (the existence of a path between two points implies the existence of an arc between those two points). 4
1, 1, 1, 1, 2, 3, 7, 11, 20, 30, 47, 71, 117, 201, 369, 703, 1323, 2463, 4446 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,5

LINKS

Table of n, a(n) for n=0..18.

CROSSREFS

Cf. A139628, A139629.

Sequence in context: A003173 A159262 A160434 * A245738 A265093 A133044

Adjacent sequences:  A139627 A139628 A139629 * A139631 A139632 A139633

KEYWORD

nonn

AUTHOR

Benoit Jubin, May 01 2008

STATUS

approved

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Last modified February 19 09:33 EST 2020. Contains 332041 sequences. (Running on oeis4.)