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A307397 as a simple table

n a(n)
0 1
1 1
2 1
3 3
4 8
5 18
6 50
7 150
8 429
9 1258
10 3835
11 11740
12 36148
13 112856
14 355318
15 1124582
16 3582186
17 11477162
18 36939043
19 119387415
20 387393424
21 1261422550
22 4120343870
23 13498085604
24 44337516318
25 145993301239
26 481812344551
27 1593439356575
28 5280074015618
29 17528034861180

[1,1,1,3,8,18,50,150,429,1258,3835,11740,36148,
 112856,355318,1124582,3582186,11477162,36939043,
 119387415,387393424,1261422550,4120343870,
 13498085604,44337516318,145993301239,481812344551,
 1593439356575,5280074015618,17528034861180]

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Last modified April 17 18:52 EDT 2021. Contains 343070 sequences. (Running on oeis4.)