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A147923 formatted as a simple table:

n a(n)
1 1
2 2
3 6
4 16
5 96
6 376
7 2016
8 12168
9 109882
10 783536
11 6232926
12 59671520
13 718155492
14 7173976288
15 76938806480
16 981871005232

[1,2,6,16,96,376,2016,12168,109882,783536,6232926,
 59671520,718155492,7173976288,76938806480,
 981871005232]

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Last modified December 7 23:50 EST 2009. Contains 170430 sequences.


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