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A118126 as a simple table

n a(n)
1 1
2 3
3 15
4 51
5 171
6 745
7 1057
8 3507
9 23205
10 50779
11 51475
12 97113
13 241887
14 593727
15 636291
16 1661215
17 6010095
18 6100953
19 8825911
20 22032619
21 24058237
22 71730273
23 84577003
24 98797723
25 119871675
26 255510487
27 380154649
28 404917765
29 704823889
30 910302427
31 1696449051
32 2565189555
33 9024827079

[1,3,15,51,171,745,1057,3507,23205,50779,51475,
 97113,241887,593727,636291,1661215,6010095,
 6100953,8825911,22032619,24058237,71730273,
 84577003,98797723,119871675,255510487,380154649,
 404917765,704823889,910302427,1696449051,
 2565189555,9024827079]

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Last modified December 4 12:55 EST 2021. Contains 349525 sequences. (Running on oeis4.)