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A157051 as a simple table

n a(n)
0 0
1 0
2 0
3 1
4 3
5 16
6 95
7 809
8 10935
9 260350
10 11712539
11 1006674967
12 164059617696
13 50335905627489
14 29003487431654737
15 31397381142185989848
16 63969560113210957966315
17 245871831682083553779103249
18 1787331725248899067681312999794
19 24636021429399867654036551645873645
20 645465483198722799426625560872826564232

[0,0,0,1,3,16,95,809,10935,260350,11712539,
 1006674967,164059617696,50335905627489,
 29003487431654737,31397381142185989848,
 63969560113210957966315,
 245871831682083553779103249,
 1787331725248899067681312999794,
 24636021429399867654036551645873645,
 645465483198722799426625560872826564232]

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Last modified April 22 07:26 EDT 2021. Contains 343163 sequences. (Running on oeis4.)