A350911 Number of regular digraphs on n unlabeled nodes.

1, 1, 2, 3, 6, 11, 56, 609, 39346, 8728237, 6126648298, 14487876826313

Offset

0,3

Links

Table of n, a(n) for n=0..11.

Crossrefs

Row sums of A350910.

Cf. A000273, A005176, A329234, A350913.

Sequence in context: A065653 A275783 A102021 * A144641 A358237 A294720

Adjacent sequences: A350908 A350909 A350910 * A350912 A350913 A350914

Keyword

nonn,more

Author

Andrew Howroyd, Jan 29 2022

Status

approved