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A099702
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Consider the family of multigraphs enriched by the species of simple graphs. Sequence gives number of those multigraphs with n loops and arcs.
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1, 2, 17, 256, 5719, 173446, 6768075, 328288840, 19468007553, 1458080017522, 183476204746761, 87209577493989776
(list; graph; refs; listen; history; internal format)
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