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

1,7

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.

Sequence in context: A036507 A369405 A202055 * A139110 A265720 A343182

Adjacent sequences: A185300 A185301 A185302 * A185304 A185305 A185306

Keyword

nonn

Author

Nathaniel Johnston, Feb 08 2012

Extensions

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

Status

approved