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A002002 as a simple table

n a(n)
0 0
1 1
2 5
3 25
4 129
5 681
6 3653
7 19825
8 108545
9 598417
10 3317445
11 18474633
12 103274625
13 579168825
14 3256957317
15 18359266785
16 103706427393
17 586889743905
18 3326741166725
19 18885056428537
20 107347191941249
21 610916200215241

[0,1,5,25,129,681,3653,19825,108545,598417,
 3317445,18474633,103274625,579168825,3256957317,
 18359266785,103706427393,586889743905,
 3326741166725,18885056428537,107347191941249,
 610916200215241]

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Last modified August 25 15:34 EDT 2019. Contains 326324 sequences. (Running on oeis4.)