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A006868 as a simple table

n a(n)
6 1
7 0
8 1
9 1
10 1
11 2
12 3
13 6
14 9
15 15
16 45
17 59
18 188
19 399
20 827
21 2472
22 5073
23 14153
24 35489
25 85726 

[1,0,1,1,1,2,3,6,9,15,45,59,188,399,827,2472,5073,
 14153,35489,85726]

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Last modified May 22 21:43 EDT 2013. Contains 225583 sequences.