A350913 Number of oriented graphs on n unlabeled nodes whose underlying graph is regular.

1, 1, 2, 3, 10, 17, 244, 2077, 181018, 12150445, 6986854715, 2456586421099, 12983287104044905, 40482495806423235417, 1213455558602787270259889, 29044259315697996254338202296, 6058969047090883735962137093497249, 785177832305082826579135707562767426031

Offset

0,3

Links

Andrew Howroyd, Table of n, a(n) for n = 0..22

Crossrefs

The labeled version is A351264.

Row sums of A350912.

Cf. A001174, A005176, A350911.

Sequence in context: A192798 A143609 A363430 * A066915 A339924 A333673

Adjacent sequences: A350910 A350911 A350912 * A350914 A350915 A350916

Keyword

nonn

Author

Andrew Howroyd, Jan 29 2022

Status

approved