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A123189 as a simple table

n a(n)
1 1
2 1
3 6
4 17
5 65
6 222
7 793
8 2785
9 9846
10 34721
11 122561
12 432462
13 1526185
14 5385697
15 19005798
16 67069745
17 236683841
18 835237566
19 2947485241
20 10401433057
21 36705804630
22 129531772097
23 457106997953
24 1613093091630
25 5692473180361

[1,1,6,17,65,222,793,2785,9846,34721,122561,
 432462,1526185,5385697,19005798,67069745,
 236683841,835237566,2947485241,10401433057,
 36705804630,129531772097,457106997953,
 1613093091630,5692473180361]

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Last modified July 25 16:03 EDT 2021. Contains 346291 sequences. (Running on oeis4.)