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A229726 as a simple table

n a(n)
0 1
1 3
2 15
3 105
4 315
5 3465
6 45045
7 9009
8 153153
9 2909907
10 14549535
11 334639305
12 1673196525
13 5019589575
14 145568097675
15 4512611027925
16 4512611027925
17 4512611027925
18 166966608033225
19 166966608033225
20 6845630929362225
21 294362129962575675
22 294362129962575675
23 13835020108241056725
24 96845140757687397075
25 96845140757687397075
26 5132792460157432044975

[1,3,15,105,315,3465,45045,9009,153153,2909907,
 14549535,334639305,1673196525,5019589575,
 145568097675,4512611027925,4512611027925,
 4512611027925,166966608033225,166966608033225,
 6845630929362225,294362129962575675,
 294362129962575675,13835020108241056725,
 96845140757687397075,96845140757687397075,
 5132792460157432044975]

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Last modified September 24 02:52 EDT 2021. Contains 347620 sequences. (Running on oeis4.)