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A325016 as a simple table

n a(n)
1 1
2 2
3 1
4 4
5 9
6 6
7 1
8 21
9 267
10 1718
11 5250
12 7980
13 5880
14 1680
15 1
16 494
17 228591
18 21539424
19 685479375
20 10257064650
21 86151316860
22 449772354360
23 1551283253100
24 3661969537800
25 6015983173200
26 6878457986400
27 5371454088000
28 2733402672000
29 817296480000
30 108972864000

[1,2,1,4,9,6,1,21,267,1718,5250,7980,5880,1680,1,
 494,228591,21539424,685479375,10257064650,
 86151316860,449772354360,1551283253100,
 3661969537800,6015983173200,6878457986400,
 5371454088000,2733402672000,817296480000,
 108972864000]

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Last modified June 23 18:45 EDT 2021. Contains 345402 sequences. (Running on oeis4.)