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A003316 formatted as a simple table:

n a(n)
1 1
2 3
3 12
4 58
5 335
6 2261
7 17465
8 152020
9 1473057
10 15730705
11 183571817
12 2324298010
13 31737207026
14 464904410985
15 7272666016725
16 121007866402968

[1,3,12,58,335,2261,17465,152020,1473057,15730705,
 183571817,2324298010,31737207026,464904410985,
 7272666016725,121007866402968]

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Last modified December 8 08:31 EST 2009. Contains 170430 sequences.


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