A364088 Number of directed multigraphs with loops containing n edges and an infinite number of vertices modulo isomorphism and reversal of all edge directions.

1, 2, 9, 37, 186, 985, 5953, 38689, 271492, 2016845, 15767277, 128792803, 1094819196, 9652396448, 88040449618, 829019941267, 8044691126159, 80322444793338, 824036583310711, 8675576699596604, 93627696274152013

Offset: 0

Author

Saibal Mitra, Jul 04 2023

Keywords

• nonn

Links

• MathOverflow, Answer to question on counting directed graphs

Crossrefs

Cf. A052171 (without identifying graphs obtained from each other by reversal of all edge directions).