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A049512 Number of quasi-initially connected digraphs on n unlabeled nodes. 2
1, 2, 13, 197, 9312 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..5.

V. Jovovic and G. Kilibarda, Enumeration of labeled quasi-initially connected digraphs, Discrete Math., 224 (2000), 151-163.

CROSSREFS

Cf. A049414, A003085, A035512, A003088, A051421.

Sequence in context: A323209 A239994 A242007 * A003507 A338979 A307066

Adjacent sequences:  A049509 A049510 A049511 * A049513 A049514 A049515

KEYWORD

hard,nonn

AUTHOR

Vladeta Jovovic, Goran Kilibarda

STATUS

approved

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Last modified June 21 15:37 EDT 2021. Contains 345364 sequences. (Running on oeis4.)