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A093990 as a simple table

n a(n)
1 1
2 2
3 8
4 68
5 550
6 5404
7 54768
8 581868
9 6329407
10 70335294
11 794064734
12 9083306888
13 105021662154

[1,2,8,68,550,5404,54768,581868,6329407,70335294,
 794064734,9083306888,105021662154]

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Last modified March 29 04:23 EDT 2024. Contains 371264 sequences. (Running on oeis4.)