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A052402 as a simple table

n a(n)
1 0
2 0
3 1
4 1
5 2
6 3
7 7
8 20
9 47
10 132
11 365
12 1032
13 3069
14 8854
15 26712
16 78830 

[0,0,1,1,2,3,7,20,47,132,365,1032,3069,8854,26712,
 78830]

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Last modified May 24 22:33 EDT 2013. Contains 225631 sequences.