OFFSET
1,7
LINKS
Sean A. Irvine, Java program (github)
V. Jovovic and G. Kilibarda, Enumeration of labeled quasi-initially connected digraphs, Discrete Math., 224 (2000), 151-163.
EXAMPLE
Table starts:
[1],
[0,1,1],
[0,0,3,4,4,1,1],
[0,0,0,7,21,37,47,38,27,13,5,1,1],
...
Number of digraphs with a quasi-source on 3 unlabeled nodes is 13=3+4+4+1+1.
CROSSREFS
KEYWORD
nonn,tabf
AUTHOR
Vladeta Jovovic, Goran Kilibarda, Sep 14 2000
EXTENSIONS
More terms from Sean A. Irvine, May 30 2022
STATUS
approved