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A249792 as a simple table

n a(n)
0 1
1 1
2 6
3 27
4 121
5 555
6 2586
7 12182
8 57867
9 276694
10 1330065
11 6421593
12 31117227
13 151254410
14 737182800
15 3601225529
16 17628257696
17 86446992591
18 424605995273
19 2088554115971
20 10286486862120
21 50722097552200
22 250374625243921
23 1237104826795590
24 6118018894827333
25 30281155790249615
26 149990627879008797

[1,1,6,27,121,555,2586,12182,57867,276694,1330065,
 6421593,31117227,151254410,737182800,3601225529,
 17628257696,86446992591,424605995273,
 2088554115971,10286486862120,50722097552200,
 250374625243921,1237104826795590,6118018894827333,
 30281155790249615,149990627879008797]

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Last modified November 27 03:26 EST 2020. Contains 338677 sequences. (Running on oeis4.)