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A100381 2^n*binomial(n,2). +0
2
0, 0, 4, 24, 96, 320, 960, 2688, 7168, 18432, 46080, 112640, 270336, 638976, 1490944, 3440640, 7864320, 17825792, 40108032, 89653248, 199229440, 440401920, 968884224, 2122317824, 4630511616, 10066329600, 21810380800, 47110422528 (list; graph; listen)
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Last modified December 2 11:54 EST 2009. Contains 167921 sequences.

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