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A218924 as a simple table

n a(n)
0 1
1 1
2 1
3 3
4 18
5 85
6 657
7 4374
8 55711
9 530502
10 6603007
11 82736601
12 2032940127
13 32102236563

[1,1,1,3,18,85,657,4374,55711,530502,6603007,
 82736601,2032940127,32102236563]

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Last modified July 26 22:10 EDT 2021. Contains 346300 sequences. (Running on oeis4.)