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A109437 as a simple table

n a(n)
0 0
1 1
2 3
3 12
4 44
5 165
6 615
7 2296
8 8568
9 31977
10 119339
11 445380
12 1662180
13 6203341
14 23151183
15 86401392
16 322454384
17 1203416145
18 4491210195
19 16761424636
20 62554488348
21 233456528757
22 871271626679
23 3251629977960
24 12135248285160

[0,1,3,12,44,165,615,2296,8568,31977,119339,
 445380,1662180,6203341,23151183,86401392,
 322454384,1203416145,4491210195,16761424636,
 62554488348,233456528757,871271626679,
 3251629977960,12135248285160]

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Last modified April 17 14:18 EDT 2021. Contains 343063 sequences. (Running on oeis4.)