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A001183 formatted as a simple table:

n a(n)
1 0
2 2
3 2
4 18
5 66
6 374
7 1694
8 9822
9 51698

[0,2,2,18,66,374,1694,9822,51698]

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Last modified December 9 18:50 EST 2009. Contains 170568 sequences.


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