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A016115 formatted as a simple table:

n a(n)
1 4
2 1
3 15
4 0
5 93
6 0
7 668
8 0
9 5172
10 0
11 42042
12 0
13 353701
14 0
15 3036643
16 0
17 27045226
18 0
19 239093865
20 0
21 2158090933
22 0

[4,1,15,0,93,0,668,0,5172,0,42042,0,353701,0,
 3036643,0,27045226,0,239093865,0,2158090933,0]

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Last modified November 27 22:38 EST 2009. Contains 167602 sequences.


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