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A289616 as a simple table

n a(n)
1 1
2 1
3 1
4 2
5 11
6 37
7 126
8 422
9 1422
10 4853
11 16786
12 58775
13 208000
14 742887
15 2674426
16 9694830
17 35357654
18 129644773
19 477638682
20 1767263171
21 6564120400
22 24466266999
23 91482563618
24 343059613627
25 1289904147300
26 4861946401427
27 18367353072126
28 69533550915977
29 263747951750332
30 1002242216651339

[1,1,1,2,11,37,126,422,1422,4853,16786,58775,
 208000,742887,2674426,9694830,35357654,129644773,
 477638682,1767263171,6564120400,24466266999,
 91482563618,343059613627,1289904147300,
 4861946401427,18367353072126,69533550915977,
 263747951750332,1002242216651339]

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Last modified October 21 03:24 EDT 2019. Contains 328291 sequences. (Running on oeis4.)