A350798 Number of unlabeled digraphs with n arcs and a global source (or sink).

1, 1, 2, 6, 21, 84, 387, 1953, 10802, 64267, 408489, 2750686, 19518841, 145236878, 1128884559, 9135566309, 76758391212, 667993213393, 6008434514996, 55755719348210, 532896254763646, 5238211003916685, 52885470406233727, 547751388283907208, 5813693205313803535, 63170000832869927871

Offset: 0

Author

Andrew Howroyd, Jan 21 2022

Keywords

• nonn

Crossrefs

Column sums of A350797.

Cf. A350360, A350752, A350796, A350906, A350907.

Programs

PARI

A350798seq(15) \\ See PARI link in A350794 for program code.