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A267228 as a simple table

n a(n)
1 5
2 25
3 110
4 470
5 1980
6 8274
7 34396
8 142474
9 588596
10 2426738
11 9989292
12 41065818
13 168636772
14 691859842
15 2836150748
16 11617837802
17 47559474708
18 194575978386
19 795613053964
20 3251559375226
21 13282278193604
22 54232112235170

[5,25,110,470,1980,8274,34396,142474,588596,
 2426738,9989292,41065818,168636772,691859842,
 2836150748,11617837802,47559474708,194575978386,
 795613053964,3251559375226,13282278193604,
 54232112235170]

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Last modified July 28 19:21 EDT 2021. Contains 346335 sequences. (Running on oeis4.)