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A124384 as a simple table

n a(n)
0 1
1 2
2 4
3 10
4 30
5 110
6 494
7 2734
8 18734
9 159278
10 1685550
11 22268974
12 367653934
13 7597868078
14 196929315886
15 6402998805550
16 261393582040110
17 13416320169124910
18 865576139256079406
19 70227589169019724846
20 7172766017169503134766
21 921829147482582383174702

[1,2,4,10,30,110,494,2734,18734,159278,1685550,
 22268974,367653934,7597868078,196929315886,
 6402998805550,261393582040110,13416320169124910,
 865576139256079406,70227589169019724846,
 7172766017169503134766,921829147482582383174702]

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Last modified June 14 00:35 EDT 2021. Contains 345016 sequences. (Running on oeis4.)