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A121180 formatted as a simple table:

n a(n)
1 0
2 0
3 0
4 1
5 1
6 5
7 6
8 26
9 32
10 133
11 176
12 708
13 952
14 3861
15 5302
16 21604
17 29960

[0,0,0,1,1,5,6,26,32,133,176,708,952,3861,5302,
 21604,29960]

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Last modified December 6 11:04 EST 2009. Contains 170427 sequences.


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