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A171822 as a simple table

n a(n)
0 1
1 1
2 1
3 1
4 9
5 1
6 1
7 30
8 30
9 1
10 1
11 70
12 225
13 70
14 1
15 1
16 135
17 980
18 980
19 135
20 1
21 1
22 231
23 3150
24 7056
25 3150
26 231
27 1
28 1
29 364
30 8316
31 34650
32 34650
33 8316
34 364
35 1
36 1
37 540
38 19110
39 132132
40 245025
41 132132
42 19110
43 540
44 1
45 1
46 765
47 39600
48 420420
49 1288287
50 1288287
51 420420
52 39600
53 765
54 1

[1,1,1,1,9,1,1,30,30,1,1,70,225,70,1,1,135,980,
 980,135,1,1,231,3150,7056,3150,231,1,1,364,8316,
 34650,34650,8316,364,1,1,540,19110,132132,245025,
 132132,19110,540,1,1,765,39600,420420,1288287,
 1288287,420420,39600,765,1]

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Last modified June 16 13:44 EDT 2021. Contains 345057 sequences. (Running on oeis4.)