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A058607
(1 + 1/2 + 1/3 + ... + 1/n) (2n-1)!/(n-1)!.
+0
1
1, 9, 110, 1750, 34524, 814968, 22424688, 705173040, 24956062560, 981852505920, 42517741069440, 2009786716304640, 102980287835712000, 5685838994441088000, 336540101841974016000
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Maintained by
N. J. A. Sloane
(
njas@research.att.com
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Last modified December 8 08:31 EST 2009. Contains 170430 sequences.
AT&T Labs Research
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