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A047769 as a simple table

n a(n)
1 0
2 0
3 0
4 1
5 0
6 5
7 0
8 26
9 0
10 133
11 0
12 708
13 0
14 3860
15 0
16 21604
17 0
18 123266
19 0
20 715216
21 0
22 4206956
23 0
24 25032840
25 0
26 150413322
27 0
28 911379384
29 0
30 5562367173
31 0
32 34164355715
33 0
34 211015212580
35 0
36 1309815397995
37 0
38 8166460799097
39 0
40 51120054233490

[0,0,0,1,0,5,0,26,0,133,0,708,0,3860,0,21604,0,
 123266,0,715216,0,4206956,0,25032840,0,150413322,
 0,911379384,0,5562367173,0,34164355715,0,
 211015212580,0,1309815397995,0,8166460799097,0,
 51120054233490]

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Last modified August 15 13:20 EDT 2020. Contains 336504 sequences. (Running on oeis4.)