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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
1, 2, 9, 37, 186, 985, 5953, 38689, 271492, 2016845, 15767277, 128792803, 1094819196, 9652396448, 88040449618, 829019941267, 8044691126159, 80322444793338, 824036583310711, 8675576699596604, 93627696274152013
OFFSET
0,2
CROSSREFS
Cf. A052171 (without identifying graphs obtained from each other by reversal of all edge directions).
Sequence in context: A150992 A151310 A000663 * A218942 A218943 A122673
KEYWORD
nonn
AUTHOR
Saibal Mitra, Jul 04 2023
STATUS
approved