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A253470 as a simple table

n a(n)
1 1
2 5
3 36
4 280
5 2201
6 17325
7 136396
8 1073840
9 8454321
10 66560725
11 524031476
12 4125691080
13 32481497161
14 255726286205
15 2013328792476
16 15850904053600
17 124793903636321
18 982500325036965
19 7735208696659396
20 60899169248238200
21 479458145289246201
22 3774765993065731405

[1,5,36,280,2201,17325,136396,1073840,8454321,
 66560725,524031476,4125691080,32481497161,
 255726286205,2013328792476,15850904053600,
 124793903636321,982500325036965,7735208696659396,
 60899169248238200,479458145289246201,
 3774765993065731405]

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Last modified January 20 15:21 EST 2021. Contains 340302 sequences. (Running on oeis4.)