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Search: id:A139623
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| A139623 |
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Table read by rows: T(n,k) is the number of directed multigraphs with loops and no vertex of degree 0, with n arcs and k vertices, which are transitive (the existence of a path between two points implies the existence of an arc between those two points). |
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5
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| 1, 1, 1, 4, 3, 1, 1, 7, 12, 9, 3, 1, 1, 13
(list; graph; listen)
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