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A197650 as a simple table

n a(n)
1 1
2 1
3 4
4 18
5 89
6 914
7 14965
8 321510
9 12712330
10 879485238
11 102013590235
12 20591125917598
13 6951014585410261 

[1,1,4,18,89,914,14965,321510,12712330,879485238,
 102013590235,20591125917598,6951014585410261]

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Last modified May 9 22:30 EDT 2024. Contains 372354 sequences. (Running on oeis4.)