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A052854 as a simple table

n a(n)
0 1
1 1
2 2
3 4
4 10
5 26
6 77
7 235
8 758
9 2504
10 8483
11 29203
12 102030
13 360442
14 1285926
15 4625102
16 16754302
17 61067430
18 223803775
19 824188993
20 3048383517
21 11318928477
22 42176798315
23 157664823501
24 591109863049
25 2222121888117
26 8374151243258
27 31630394287364
28 119725350703472

[1,1,2,4,10,26,77,235,758,2504,8483,29203,102030,
 360442,1285926,4625102,16754302,61067430,
 223803775,824188993,3048383517,11318928477,
 42176798315,157664823501,591109863049,
 2222121888117,8374151243258,31630394287364,
 119725350703472]

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Last modified November 28 20:57 EST 2020. Contains 338755 sequences. (Running on oeis4.)