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A007290 2*C(n,3).
(Formerly M1831)
+0
27
0, 0, 0, 2, 8, 20, 40, 70, 112, 168, 240, 330, 440, 572, 728, 910, 1120, 1360, 1632, 1938, 2280, 2660, 3080, 3542, 4048, 4600, 5200, 5850, 6552, 7308, 8120, 8990, 9920, 10912, 11968, 13090, 14280, 15540, 16872, 18278, 19760, 21320, 22960 (list; graph; listen)
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Last modified December 10 00:48 EST 2009. Contains 170565 sequences.


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