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A053527 Number of bipartite graphs with 4 edges on nodes {1..n}. +0
3
0, 0, 0, 0, 3, 140, 1125, 5355, 19075, 56133, 143955, 332475, 706860, 1404975, 2640638, 4733820, 8149050, 13543390, 21825450, 34227018, 52388985, 78463350, 115233195, 166252625, 236008773, 330108075, 455489125, 620664525, 835994250 (list; graph; listen)
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Last modified December 7 08:40 EST 2009. Contains 170430 sequences.


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