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A152226 as a simple table

n a(n)
0 1
1 2
2 5
3 14
4 42
5 132
6 428
7 1416
8 4745
9 16034
10 54505
11 186166
12 638538
13 2198692
14 7598624
15 26350944
16 91670946
17 319825796
18 1118686730
19 3921801820
20 13775938132
21 48473233032
22 170815501576
23 602710956464
24 2128981351316
25 7527515059432
26 26637591204996
27 94331697697688

[1,2,5,14,42,132,428,1416,4745,16034,54505,186166,
 638538,2198692,7598624,26350944,91670946,
 319825796,1118686730,3921801820,13775938132,
 48473233032,170815501576,602710956464,
 2128981351316,7527515059432,26637591204996,
 94331697697688]

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Last modified March 22 17:25 EDT 2019. Contains 321422 sequences. (Running on oeis4.)