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A218918 as a simple table

n a(n)
0 1
1 1
2 1
3 5
4 39
5 192
6 1717
7 13946
8 243391
9 2693043
10 38343715
11 545787051
12 15787210045
13 268796141406 

[1,1,1,5,39,192,1717,13946,243391,2693043,
 38343715,545787051,15787210045,268796141406]

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Last modified June 5 01:34 EDT 2024. Contains 373102 sequences. (Running on oeis4.)