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A146223 as a simple table

n a(n)
1 1
2 1
3 1
4 1
5 5
6 21
7 64
8 303
9 1134
10 7339
11 57196
12 589857
13 6245651
14 99774377
15 1593180484
16 36586038636
17 878744243108
18 30250721237881

[1,1,1,1,5,21,64,303,1134,7339,57196,589857,
 6245651,99774377,1593180484,36586038636,
 878744243108,30250721237881]

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Last modified January 26 16:03 EST 2022. Contains 350599 sequences. (Running on oeis4.)