A185303 Number of unlabeled digraphs on n vertices such that every vertex has outdegree 5.

0, 0, 0, 0, 0, 1, 100, 967255, 14971125930, 278086517599356, 6521004095675547914, 197419530111112377546537, 7747427934648623352166753715, 392370903258277676503800999871543, 25436929780226775791085690703723141426, 2090584629532654146005764252197925046719651

Offset: 1

Author

Nathaniel Johnston, Feb 08 2012

Keywords

• nonn

Links

• Andrew Howroyd, Table of n, a(n) for n = 1..50
• L. Travis, [math/9811127] Graphical Enumeration: A Species-Theoretic Approach

Crossrefs

Column k=5 of A329228.

Cf. A001373, A129524, A185193, A185194.

Extensions

Terms a(10) and beyond from Andrew Howroyd, Nov 08 2019