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A117279 Triangle read by rows: T(n,k) is number of labeled bipartite graphs with n nodes and k edges. +0
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1, 1, 1, 1, 1, 3, 3, 1, 6, 15, 16, 3, 1, 10, 45, 110, 140, 60, 10, 1, 15, 105, 435, 1125, 1701, 1200, 480, 105, 10, 1, 21, 210, 1295, 5355, 14952, 26572, 26670, 17535, 7840, 2331, 420, 35, 1, 28, 378, 3220, 19075, 81228, 246414, 507424, 666015, 620900, 431368 (list; graph; listen)
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Last modified December 10 00:48 EST 2009. Contains 170565 sequences.


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