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A029767
(n-1)!*(2^n-1).
+0
7
0, 1, 3, 14, 90, 744, 7560, 91440, 1285200, 20603520, 371226240, 7428153600, 163459296000, 3923502105600, 102017281766400, 2856571067750400, 85698439706880000, 2742370993410048000
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Maintained by
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Last modified December 17 23:40 EST 2009. Contains 171025 sequences.
AT&T Labs Research
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