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A006385 formatted as a simple table:

n a(n)
0 1
1 2
2 4
3 14
4 52
5 248
6 1416
7 9172
8 66366
9 518868
10 4301350
11 37230364
12 333058463
13 3057319072
14 28656583950
15 273298352168
16 2645186193457
17 25931472185976

[1,2,4,14,52,248,1416,9172,66366,518868,4301350,
 37230364,333058463,3057319072,28656583950,
 273298352168,2645186193457,25931472185976]

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


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