A325115 Number of simple graphs on n unlabeled nodes with exactly 1 endpoint (node of degree 1).

0, 0, 0, 1, 6, 35, 260, 2934, 53768, 1707627, 96648020, 9886429142, 1842161884708, 629505254017556, 397043155634566696, 464930596621838689900, 1016021072554513545893264, 4162479064042009639168386134, 32096876145378032622994745784856

Offset

1,5

Links

Andrew Howroyd, Table of n, a(n) for n = 1..50

Crossrefs

Column k=1 of A327371.

Cf. A277072 (labeled case), A325125.

Sequence in context: A355381 A244267 A187443 * A087631 A167579 A357095

Adjacent sequences: A325112 A325113 A325114 * A325116 A325117 A325118

Keyword

nonn

Author

Andrew Howroyd, Sep 04 2019

Extensions

Terms a(11) and beyond from Andrew Howroyd, Feb 02 2021

Status

approved