A350492 Number of unlabeled acyclic digraphs with n arcs and a global source and sink.

1, 1, 1, 2, 5, 14, 44, 153, 584, 2414, 10732, 50909, 256198, 1360645, 7593530, 44366458, 270517289, 1716555943, 11308051214, 77170484915, 544525867544, 3965944595335, 29769162604337, 229970873746105, 1826057472681595, 14886348784740516

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 A350491.

Cf. A122078, A345258, A350451, A350490.

Programs

PARI

A350492seq(20) \\ See PARI link in A122078 for program code.