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A054393 as a simple table

n a(n)
0 1
1 1
2 2
3 5
4 14
5 42
6 132
7 428
8 1417
9 4757
10 16119
11 54963
12 188219
13 646460
14 2224944
15 7668915
16 26461005
17 91371594
18 315689675
19 1091166442
20 3772747245
21 13047503222
22 45131078409
23 156129312025
24 540181837728
25 1869097588540
26 6467740095295

[1,1,2,5,14,42,132,428,1417,4757,16119,54963,
 188219,646460,2224944,7668915,26461005,91371594,
 315689675,1091166442,3772747245,13047503222,
 45131078409,156129312025,540181837728,
 1869097588540,6467740095295]

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Last modified February 21 01:03 EST 2019. Contains 320362 sequences. (Running on oeis4.)