A363163 Number of directed multigraphs without loops containing n edges and an infinite number of vertices modulo isomorphism and reversal of all edge directions.
1, 1, 5, 17, 83, 394, 2278, 13949, 93898, 670003, 5059914, 40033149, 330555726, 2836763749, 25233047351, 232080785282, 2202802051834, 21539083861802, 216638327167235, 2238260395921444, 23725940481578999
Offset: 0
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Crossrefs
Cf. A364088 (with loops).