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A006348 as a simple table

n a(n)
1 0
2 1
3 4
4 25
5 174
6 1393
7 12536
8 125361
9 1378970
10 16547641
11 215119332
12 3011670649
13 45175059734
14 722800955745
15 12287616247664
16 221177092457953
17 4202364756701106
18 84047295134022121
19 1764993197814464540
20 38829850351918219881
21 893086558094119057262

[0,1,4,25,174,1393,12536,125361,1378970,16547641,
 215119332,3011670649,45175059734,722800955745,
 12287616247664,221177092457953,4202364756701106,
 84047295134022121,1764993197814464540,
 38829850351918219881,893086558094119057262]

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Last modified June 21 18:33 EDT 2021. Contains 345365 sequences. (Running on oeis4.)