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A189805 as a simple table

n a(n)
0 0
1 1
2 3
3 75
4 245
5 6615
6 22869
7 1288287
8 4601025
9 265939245
10 969738055
11 28510298817
12 105468168351
13 3138933581875
14 11734782467625
15 1409850293610375
16 5313200518272825
17 642897262711011825
18 2438232652696561875
19 74176455589813182375
20 282762879579212657625

[0,1,3,75,245,6615,22869,1288287,4601025,
 265939245,969738055,28510298817,105468168351,
 3138933581875,11734782467625,1409850293610375,
 5313200518272825,642897262711011825,
 2438232652696561875,74176455589813182375,
 282762879579212657625]

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Last modified July 17 05:50 EDT 2024. Contains 374360 sequences. (Running on oeis4.)