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A169934 as a simple table

n a(n)
1 0
2 0
3 0
4 1
5 5
6 66
7 392
8 4859
9 34659
10 482272
11 4099634
12 65762489
13 653977909
14 12026621478
15 137361430156
16 2862534403223
17 36968414699239
18 862935261673212
19 12440701298168534
20 321935664074780549

[0,0,0,1,5,66,392,4859,34659,482272,4099634,
 65762489,653977909,12026621478,137361430156,
 2862534403223,36968414699239,862935261673212,
 12440701298168534,321935664074780549]

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Last modified August 4 13:49 EDT 2020. Contains 336201 sequences. (Running on oeis4.)