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A229936 as a simple table

n a(n)
0 0
1 0
2 0
3 3
4 12
5 45
6 126
7 343
8 848
9 2034
10 4700
11 10648
12 23652
13 51935
14 112798
15 243120
16 520592
17 1109063
18 2352366
19 4971426
20 10473220
21 22003464
22 46115300
23 96440127
24 201288792
25 419381450
26 872351896
27 1811858058
28 3757992280
29 7784495839
30 16105959240
31 33285784442

[0,0,0,3,12,45,126,343,848,2034,4700,10648,23652,
 51935,112798,243120,520592,1109063,2352366,
 4971426,10473220,22003464,46115300,96440127,
 201288792,419381450,872351896,1811858058,
 3757992280,7784495839,16105959240,33285784442]

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Last modified July 26 13:40 EDT 2021. Contains 346294 sequences. (Running on oeis4.)