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A217858 as a simple table

n a(n)
1 1
2 1
3 3
4 3
5 15
6 15
7 105
8 105
9 315
10 315
11 3465
12 3465
13 45045
14 45045
15 45045
16 45045
17 765765
18 765765
19 14549535
20 14549535
21 14549535
22 14549535
23 334639305
24 334639305
25 1673196525
26 1673196525
27 5019589575
28 5019589575
29 145568097675
30 145568097675
31 4512611027925
32 4512611027925
33 4512611027925

[1,1,3,3,15,15,105,105,315,315,3465,3465,45045,
 45045,45045,45045,765765,765765,14549535,14549535,
 14549535,14549535,334639305,334639305,1673196525,
 1673196525,5019589575,5019589575,145568097675,
 145568097675,4512611027925,4512611027925,
 4512611027925]

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Last modified April 23 07:37 EDT 2021. Contains 343201 sequences. (Running on oeis4.)