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A128732 as a simple table

n a(n)
0 0
1 0
2 1
3 5
4 23
5 106
6 493
7 2312
8 10917
9 51840
10 247319
11 1184557
12 5692517
13 27434578
14 132547877
15 641789941
16 3113487683
17 15130119784
18 73637665027
19 358883327591
20 1751237017413
21 8555108199294
22 41836182269267
23 204779733440086

[0,0,1,5,23,106,493,2312,10917,51840,247319,
 1184557,5692517,27434578,132547877,641789941,
 3113487683,15130119784,73637665027,358883327591,
 1751237017413,8555108199294,41836182269267,
 204779733440086]

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Last modified December 2 08:31 EST 2021. Contains 349437 sequences. (Running on oeis4.)