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Search: id:A137975
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| A137975 |
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Row sums of A139621, number of connected directed multigraphs with loops and no vertex of degree 0, with n arcs. |
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+0
2
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| 1, 2, 8, 32, 167, 928, 5924, 40211, 293370, 2255406, 18201706, 153141115, 1339341815, 12124729941, 113363309476, 1092332531380
(list; graph; listen)
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