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A185194
Number of unlabeled digraphs on n vertices such that every vertex has outdegree 4.
5
0, 0, 0, 0, 1, 40, 35317, 56150820, 111359017198, 278086517599356, 877760741062694898, 3482578978170418753715, 17204168691253789080138981, 104690934973509839187285618311, 776311587313178356520412354767734, 6942595716239018207126337605515965388
OFFSET
1,6
CROSSREFS
Column k=4 of A329228.
Sequence in context: A204682 A205158 A205307 * A214138 A239168 A167061
KEYWORD
nonn
AUTHOR
Nathaniel Johnston, Feb 08 2012
EXTENSIONS
Terms a(10) and beyond from Andrew Howroyd, Nov 08 2019
STATUS
approved