A350490 Number of unlabeled acyclic digraphs with n arcs and a global source.

1, 1, 2, 5, 15, 50, 191, 795, 3625, 17781, 93319, 519732, 3056185, 18880345, 122066437, 823118881, 5772473719, 41995743085, 316258151517, 2460542117337, 19743544526463, 163138014893817, 1386173917051704, 12096681529032989, 108293699332498981

Offset: 0

Author

Andrew Howroyd, Jan 08 2022

Keywords

• nonn

Links

• Andrew Howroyd, Table of n, a(n) for n = 0..40

Crossrefs

Column sums of A350488.

Cf. A122078, A350415, A350451, A350492.

Programs

PARI

A350490seq(20) \\ See PARI link in A122078 for program code.