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A257490 as a simple table

n a(n)
1 1
2 1
3 3
4 1
5 15
6 15
7 1
8 28
9 35
10 210
11 105
12 1
13 45
14 210
15 630
16 1575
17 3150
18 945
19 1
20 66
21 495
22 462
23 1485
24 13860
25 5775
26 13860
27 51975
28 51975
29 10395
30 1
31 91
32 1001
33 3003
34 3003
35 45045
36 42042
37 105105
38 45045
39 630630
40 525525
41 315315
42 1576575
43 945945
44 135135

[1,1,3,1,15,15,1,28,35,210,105,1,45,210,630,1575,
 3150,945,1,66,495,462,1485,13860,5775,13860,51975,
 51975,10395,1,91,1001,3003,3003,45045,42042,
 105105,45045,630630,525525,315315,1576575,945945,
 135135]

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Last modified February 27 03:50 EST 2020. Contains 332299 sequences. (Running on oeis4.)